Right on Heidi... it's a friggin catch can, not a nuclear missile. Does it flow air but knock vapor out? If the answer is yes, then it works. You don't need, nor do you want, a "high-flow" catch can as some have suggested... venting the crankcase is just that, venting... not sucking the bejeezus out of!
BT's can works as well as a catch can would ever need to, end of story. As pretty as it is, it'd be off my car if it sucked, that's just the way it goes. No parlor tricks or hoopla, just a lot of oil accumulating that isn't making it to my cylinders.