I use my Nano S quite a bit for Eth, Tokens, and Bitcoin and it works great. The X seems to make sense for wireless and more space for apps. However, with an S in hand, and usually using it at my desktop the wireless aspect isn't a big deal. The increased space makes sense, as I can only put like 3-5 apps on my S, but since it is pretty quick and easy to swap out apps when I need to (without changing keys or loosing any transaction info) it isn't that big of a deal. So I'm probably going to get an X at some point, but not right away since my S is working great.