Just wanted to share my experience.
Well we played this game a lot. We played some variants, like build one tower, build own tower, buy pieces and build, steal pieces and so on.
Here's what i saw and learned:
It easy, just get all tiles out and start playing. But wait, you will need a good platform to play on, a stable table or so. Else there will be fallowing towers. Had the problem in one game, where the table was easy to shake and a stringer punch or even a hand put on table was enough to bring some towers down. Yes the towers were not that stable, but they would have not fallen. Keep that in mind.
It's fun with that many variants, you can play one variant, than change it and so on.
You pick a block, try to get it on the tower, your own, common, don't matter. Depending on the variant you win with different conditions.
Medium, you get to build a lot of crazy towers and some get unbelievable. But the game goes on the same every time and fast is boring if you play it too much. Recommended not to play every evening.
I like this game, but like mentioned above, would not play it every weekend. And of course you will need the right friends to play with. Not everyone will like to make a tower from wooden blocks and then another and another.
I give it a 7 from 10. It's fun and fast too play.