Build thread here if you need one:
http://www.sead.us/kitreviews.html
http://www.sead.us/leoreview.html
The Leo is (IMHO) the best Tamiya tank you can get engineering wise and reliability wise, much better than the WWII tanks. Also better than many other brand tanks.
I have battled extensively with the Leo's and they always perform well.
They have the most up time of any of my collection.
Oh, and they work very well with the 2.4GHz FAAST Futaba system if you want to use a PCM type radio.