Not bad. Slam Bolt Scrappers is a nice little head-to-head action Tetris inspired puzzle game (no online play, though), and Go Home Dinosaurs is supposed to be a pretty solid tower defense. With the card money back, if you want both games and happened to miss SBS when it was in a Groupees, I'd recommend the pack.
GHD is alright. I liked it a lot at first, but after a while it became pretty obvious it was a basic iOS game to start.
It has some cool ideas like the towers fitting into the board in tetris like shapes, but then theres stuff like the fact you can't remove towers and that you are often force to rely on a specific loadout do to the scarcity of coconuts (those 8 coconut cards can go screw themselves). Not being able to upgrade your towers also makes it feel like an overly simplified version of TD (maybe intentional, but I got bored after a short while because of it). There is also a rather big difficulty spike early on, which I found annoying.
That said it is still a fun game with a lot of charm, and I can see most people enjoying it for at least the first world (it doesn't have the greatest staying power). If you only have a cursory interest in TD games though or dislike high pitched animals making pop culture references on the side, you probably won't get much out of it (aside from the cardz obviously