I've only had a couple flights with mine (40 ARF), but the ground handling seems reasonable using the provided tailwheel setup. Mind you, I'm running off of a grass strip, and usually try to get into the air fairly quickly.
I added the wing struts, just for looks. They aren't for support, but they provide a "little" bit of strengthening.
How about floats? Any comments about which ones, handling etc? There is a pond at our field, and I'm interested in trying some float flying.