A few others have already answered pretty well, and the
andrology.co.uk online guide is very good (BUT outdated abit). Anyway, I thought Id chime in abit.
Im 10 days post op, I had my 1st stage pubic/abdominal phalloplasty with the London (andrology.co.uk) team. I havent had the urethral work done yet, or erectile device, but Ill say what I know.
Can it get hard on its own?
Metoidioplasty provides you with a penis (albeit pretty small) that can get unassisted erections, but more often than not, is not big enough for penetration.
For the phalloplasty, there are different type of prosthetics, the inflatable rods, which give you a firm erection and can go back to flaccid. This is by a pump in one of the testicles.
And much more uncommonly is the malleable rod, which is permanently quite firm, you just manipulate it into "hard" and "flaccid" positions.
Or you can opt out of having the device, and just use external things i.e a condom or two for extra rigidity.
Ive not heard of guys having any problems with bladder control. As others have said, your bladder is fine, its your urethra thats worked on,so Id imagine that youd still have the same control.
In terms of sensation, it depends on many things, the type of phallo you had (or if you had meta, then your sensation is probably going to be just as good as pre op),and the way your body heals.
Forearm phallos tend to give the best sensation, due to the various nerves being utilized.
Pubic phallos, I was warned, can end up insensate. At the moment, I actually have perfect sensation in the bottom 1/3 so far. It can actually tickle, it feels good. This surprised me that I have decent sensation so early on, but one of my nurses said that my young age, and being healthy and a non smoker, contributes to this.
My next op will probably involve nerve work, so they should generate more and better erotic sensation throughout the penis.
But many guys talk of how amazing their sensation is, theyre able to cum during sex with no problem.
I dont know how itd be for anal. Never done (or had the urge) for anal, so have no idea on what firmness that would be needed, but I think the erectile devices do get pretty firm!