Buddy Press – Yay or Nay?

I was planning to install Buddy Press… but before I do, I’d like to get some thoughts on the following please:

1. Once I go with Buddy Press, is it pretty much a one-way trip? Or can I back out later if I decide to without any dire consequences?

2. Is there ANY reason at all why I’d want to NOT install Buddy Press? Anything I should at least know first? I’d rather learn from others’ mistakes, rather than my own.