I love my half bike!
Yep, it's got a learning curve. But stick with it! The "learning curve" the half bike folks show is pretty accurate, you think you can't, then maybe you can, then you think you're not getting better (for a longish time) then suddenly it's intuitive! I'm 64 years old, not particularly athletic, and I'm digging it. My kids and grandkids all borrow my bike when they come to my house - I think I'm going to have to buy some more so we can race!