Speaking of the devil her self.

hehe
Warning: I get a bit explicit and maybe I get into TMI... I tried to tone it down a some to keep things PG14-ish. Hey, the horns keep my halo up and in place after all!
Anyway, your health, diet, etc will affect how you taste. Probiotics help your vagina to be healthy. It's not a requirement, but it can help your vaginal flora in a lot of ways. A healthy vaginal flora is good for you. You don't need to take them every day, as the probiotics will take hold.
There are many things that can affect your vaginal flora (the good bacteria that keeps your vagina healthy inside), such as health, stress, antibiotics, yeast infections, bad bacteria, etc. A healthy vaginal flora will fight off bad bacteria and yeast from taking hold down there - probiotics can boost and support your natural vaginal flora, fighting off the bad stuff. A yeast infection isn't pleasent -- that was my "welcome to womanhood you've now got a vagina" welcome wagon. Oh, yay! I had pretty bad problems for a while, which also induced a lot of bladder infections, causing all kinds of chaos down there. Probiotics made a huge difference with my vaginal health and quality of life. I've only used one bottle, and never needed them since. I have a healthy vagina with healthy vaginal flora -- that fights off yeast infections as well as bladder infections.
As for my sexual experience, before I had SRS I was dating a post-op woman. So, yes, I have sex with a post-op woman using my pre-op parts (aka penis), and I also tasted her. Her vagina tasted slightly sweet, pleasant, and smelled like normal vagina -- actually, one of the best I've ever tasted, to be honest. I've heard that often post-op women have the best tasting pussy.

(not just from my experience, but from others who have been with post-op women and also from what people have told me what I taste like).
The feeling (with using my male part in her vagina) felt normal, with a slight tightness but not in an uncomfortable way (honestly, the only time I ever really enjoyed sex with the male part). Very, very enjoyable. I've had men who have said similar comments in regards to my post-op vagina - tight, but not too tight, just right. (however, it can be tighter at first if you haven't dilated in a while). I've made men cum pretty quickly, however -- I've had several comments about how they usually take a much longer time and with me it's boom. In my experience with my ex-gf, I never really orgasmed with other women, except for a couple of times after a long, long, tiring time. With my ex, it was much faster and more enjoyable... it was the best sex I had pre-op.
You have a lot of muscle control down there, and when you orgasm you have the same contractions as a natal woman during orgasm. The first few times having sex are a bit awkward, 'cause you basically need to re-learn sex. Relaxation is key.
With your fingers down there, it will feel smother inside -- although over time the inside feels more like a natal woman's inside. Most don't notice at all. You will also have a g-spot, which is in the same spot as a natal woman's is.
I have had sex with men and women who didn't notice any difference with me vs another women. (Side note: Every vagina is different, post-op or natal, and post-op is nearly or identical to the typical range of vagina out there... basically, you have nothing to worry about that someone will find your post-op vagina off or unusual vs the other vaginas out there... and in ranges of pussy, a lot of post-op women are on the premium side of the range of pussy. )
Also, a penis will adjust to your vagina, so bottoming out isn't much of an issue. It can happen, but it also happens with a lot of natal women as well. You may feel the penis as it hits the end, and at first, it might feel uncomfortable, strange, or a slight pressure -- then you get used to it, it doesn't hurt, and in fact, it feels real good.
As times goes on, you'll find that your post-op vagina will also stretch and mold like a natal woman's vagina -- after, it slowly goes back and gets a bit tighter. That's the same for all women, although. With a post-op vagina, however, there's a bit of an advantage in that although sex and dilation makes it looser, it goes back into shape faster. Some women seem to be very loose, which can be genetics, having children, or other factors... usually exercising the pelvic floor muscles help it go back into shape (kegel exercises). Kegel exercises are also very good for post-op women as well as natal women. Kegals not only affect your vaginal health and performance, it also affects your bladder (in a good way).
You will self-lube, but the amount of lube can vary, just like in other women. Diet, medications, stress and your health can all affect your lube. There have been times when I didn't need any; however, I enjoy a small amount of lube. There's nothing wrong with that, a lot of women use lube and find it more comfortable. It really varies, some women are crazy wet and some are not. I've dated natal women drier than I am, and needed copious amounts of lube for comfort and enjoyment. I would say that I'm average in terms of self-lubing (so was my ex). Some days I get more wet, other times not so much -- again, diet, stress, medication, etc affect down there a lot... lube, taste, all that... same goes for all women, post-op or natal.
In conclusion, post-op pussy rocks and was the best I ever had and now have.

*gothique11*
Footnote: My SRS was performed by Dr. Brassard; my ex had her's done my Dr Mannard of the same clinic, about a year before I had mine... I started dating her a couple months before my SRS. After that, I had a lot of confidence about going to Montreal for my SRS. I can't vouch for other surgeons and their results, since I haven't experienced it; although, I'm sure a competent surgeon will have similar results - a wonderful vagina that rocks this world!