The quality of the game is really good and the new version seems to run very smooth at 60fps this time around. It does feature an auto-play system for the lazy or busy players. As mentioned earlier, the game seems to be fully voiced though I have no idea what's going on since I skipped most of the cutscenes to get to my 2nd 10 roll faster, which you can get around to by playing through 5 chapters of the game.
I usually like to start my games full f2p and spend some money if I end up enjoying it. You'll get a free female "Knights" character named Rebecca after a month's worth of daily logins. Is it worth playing? I ended up rerolling for a couple normal non-special SS tiers characters instead of the special Knights type. After saving up another 200 gems for another 10 roll and failing, I wasn't in the mood to continue playing, at least for the day. (Updated) There are some people saying that they received a special Knight from rerolling must be less than 0.1%, is it time to reset data again? T_T I'm determined to get at least one, so time to delete this account, I think!
JP Wiki: Link
Game Site: http://knights.netmarble.jp/