Personally I use lipos exclusively in everything I have. However most of the stock systems available are not setup for lipos at this time and run the voltage down way lower than you want on a 2S lipo. In fact I've seen some controllers run down to 6V or lower for the NIMH batteries. I suggest to all who wish to run lipo either do one of these two things:

• Run a simple LVA (low voltage alarm) off your balance leads. Make sure the beeper is super loud and that you aren't too far away.
• Better yet, run an aftermarket system that allows you to send battery voltage telemetry back (like FRSky and FlySky) and monitor it from your transmitter.

I honestly haven't seen a need to move at the consumer level to lipos yet, though the weight is starting to inch up where I might be considering looking into that more. There is also the additional costs to ship and store lipos too There are all kinds of shipping restrictions on lipos and storage for them is pretty scary here in FL. They are much more temperamental when it comes to storage than NIMHs and heat. The last thing I worry about is safety. WOW would you guys be surprised at some of the stories I hear haha. In fact a pretty large hobby store burnt down about a year ago due to one of the "techs" charging a lipo as a NIMH to recover it a few volts so he could charge it correctly. He wasn't paying attention just for a minute or two and the whole store burnt down. One thing good I can say about the NIMH batteries.... they are pretty darn safe albeit a bit weak sometimes. To each his own though, those lipos can be super dense and great to work with if you know your stuff.