This is part 2/4 of my iPad-version review series of 4 classic boardgames.
Catan HD is a good game to play, at least as a single player experience. Sadly hotseat doesn't suit the iPad version since trading gets really annoying very fast.
The graphics are nice and the gameplay is enjoyable on the iPad. Only the trading screen is a bit small for me and it takes effor to switch the resourses around.
Catan seems to crash time to time on my iPad 1 but it is not too often it does that.
Catan HD is a good version of the board game but you have to buy the expansion (+4€) to get the most of it. With that, the game is a good purchase.