I like and own both. I find some three piece bows are beautiful and the same can be said for one piece bows. I personally shoot better with some mass in the riser. I hate that, but it's a fact, so you will rarely see me in the woods with a one piece. In fact, I should sell some to help finance my new take-down but they are just so nice.
I'll be shooting three piece takedowns from now on. No need spending money for something I don't use. Oh well, that's my resolution to keep until at least February.