I love the puzzles and they make you think about every single move you make, which is actually a good thing. Because I know that not everyone does actually think about the future turn(s) while deciding whether to play something productive or defensive.
Biggest issue for me is the relying heavily on random luck, and not being able to watch an ad to immediately try again, or for free gems for that matter.
For the person complaining about having to watch five ads to complete the challenge, consider yourself lucky. Like saintlydevils, I have to wait an hour and that means sometimes I am down to literally my last chance to win, and I can recall that four occasions so far. Lucky for me, I ended up finally getting the win....a couple times with less than twenty minutes till the next daily challenge