Just great - and now updated for iOS11! – Reiner Knizia's Medici HD Review

I bought this game somewhat on a whim, and ended up being really surprised by it. I've probably played it the most of the games I own. It's a clean, simple, attractive implementation of a finely honed auction game. It takes 5-10 minutes to play, so it's perfect to pull out in a spare moment. And it has an array of quick, interesting decisions to make. But what really makes this game shine are the AI players. The developers must really have worked on the AIs, which are well-crafted and (increasingly) challenging to play against. Highly recommended.
Review by 1000 Splinters on Reiner Knizia's Medici HD.