I wasn't crazy about the wireless part of the G700 at first, but after a short time using it (1-2 days for me) I prefer wireless more. I originally got it back when it first came out to get a few extra buttons (Macros for WoW), and I haven't regretted it at all. I agree with RainMotorsports though, I wish it had another battery or used a LiIon. Even with that you still get 3 days of life from it at full settings, which is pretty decent. Another plus is the data cable is USB/Mini USB? Most smart phones use the same connection so you can charge your phone when your mouse isn't charging. One thing I will say that a lot of people complained about the G700 was that the Data cable was a bit thick. I found at first that it was a little but after use, the wire becomes more flexible or you just get use to it.
All in all, I bought this when it was $99. Still worth every penny in my opinion. Like I said though if you can find a MX518, I would go with that for sure. They should go for about $30 and last a life time (I've had my MX518-Red for about 8 - 9 years and it's been though hell but still works like the day I got it). Only problem is Logitech no longer makes them so finding one around what I quoted might take a little while, worth it if you find it.