I have a set (10 - 35 lb) and really enjoy them. The handles feel great, just right for me. The only downside I can think of is when you're in a crusher or ball grip, you can't really cup your hands around it since it's not ball shaped.
When I started with KBs, I really appreciated the contour shape while doing cleans and snatches! Now it's not a big deal, but I went through a bruising period for a bit while getting the hang of things!
FWIW, I did start with regular KBs and gave these a whirl and ended up going with these - I think it's just personal preference. Why not buy one at Target and give it a try? Worst case you hate it and return it.