> What I found was that getting the basic functionality going is obviously not that hard, but building a good and useful UI requires quite a bit of effort. The

> What I found was that getting the basic functionality going is obviously not that hard, but building a good and useful UI requires quite a bit of effort. The hardest part for me is always a "good" UI, I can make it useful, but getting it to look good, smooth and feel pleasant is the biggest challenge.