I ordered the eroticreations 5.5in 3-in-1 two days ago, so I cannot give you a review on it. I ordered mine primarily for stp use, but seeing as I've had zero luck with stps in the past (I've tried 3 others so far), I'm not holding my breath. But I believe that's just due to my anatomy, not the actual equipment.
Now what I can say is that in my opinion, the adhesion part, no matter which company, just sounds better than it actually is. I bought the ReelMagik STP when it came out, and was thrilled with the idea of having an stp/packer that was adhered to my body throughout the day and I could just "whip it out" when I needed to go.
Needless to say I was rather disappointed with the whole adhesion process. The adhesive would start to wear out throughout the day and the tab would start to peel from just normal day to day movements like sitting down, driving a car, standing up etc. not to mention the adhesive was a HUGE pain in the ass to remove from your skin. Even with the adhesive remover, I would be left scrubbing my self for a good ten minutes with a rag and baby oil (baby oil seemed to remove the adhesive the best) and even then sometimes there was a slight sticky residue. It was just not comfortable at all. Not to mention if you got adhesive in places besides on the tab, your skin will stick to other parts of skin.
Now this is just my experience and opinion, not trying to crush your dreams, but maybe shed a little light on the whole "adhesion" thing.
Honestly, harness are the way to go for me. I actually just use a simple sling I made from shoelaces using this design and it works phenomenally, couldn't be happier.
http://www.ftmguide.org/images/simpleharness.pdfBut, all in all, I think the Eroticreations is a great value (obviously saying this before I've had a chance to see it first hand). From what I've seen, it has pretty great detail for the price.
I will be making a review of it once I receive it, as well as a packer I ordered from Sinthetics a few weeks back whenever that comes in.