Ah the eternal debate. As said before, personal preference. I can't say one's better than the other, but I prefer Better Bottles - especially after one slipped out of my hands while washing it the other day and I chased it as it bounced across the floor. Yes, I was sober. Soapy things are slippery, especially smooth plastic and glass.
BBs easy to clean, light, and don't break. I've done almost 40 batches in mine so far. There are no leftover odors or flavors. Most of the time I don't even use soap to clean them, just hot water and a dishrag.
And unless you're scrubbing them with a stiff brush, the whole "OH NOES YOU'LL GET INFECSHUNS" argument is not one to be scared of. How many infections have we heard of being attributed to scratched Better Bottles?
I don't want to have to be mega-careful around my equipment, always fearful that I'll drop it and lose all of my hard beery work, or worse, injure myself.
/my opinion
-Joe