3 stars: The app works and provide a good on the go army builder and card reference. It could be more streamlined and the ultimate bundle price is a bit of a sticker l shock. It's great value but it would be nice if buying the armies individually allowed you to acquire the same status as the bundle since you did end up spending more in the long run. All in all if you play Warmachine the app is very helpful if you don't want to print the cards out.
3 stars: It can be a little unintuitive at times but once you get used to it it's great for theorycrafting army builds. It runs a little bit harsh, seems like it could have been optimized a little more. The way the game rules are updated its a bit of a must. If you play the game much at all just buy the whole set of army rules. But don't bother buying anything for Company of Iron, they already completely bailed on supporting that format.
3 stars: Yes you have to pay for bundles of digital cards, but has everything up to date. Sometimes updates break the app. My biggest concern is the pdf with the rules doesn't always send me to the right section to clarify the rules. Should just cover it to a text lookup. Doesn't need to be pdf.
4 stars: Handy and mostly functional. If I had one MAJOR complaint it would be that the card interface links to a pdf for rules which can take forever to load. I'd just bring up a rule bubble or something no need to hotlink to a full color version of a 400pg rule book. May have slightly exagerate...