[Sean M]

From my experience, flex sensors are incredibly unreliable -- not in the respect of reading, but more in interpretation of what a certain reading means.

The flex sensors have so many different ways to bend (providing ambiguity in what a certain reading actually means), that if you are going to try to use them for much more then binary calculations (Am I touching something?) it's probably going to be difficult to get to work, if it does.

I would imagine that you're not going to use flex sensors for wall following or the sort, but just something o keep in mind if you've never worked with them before.