I tried
Yeti for the first time last night, and I don't know if it was beginners luck or what, but I had a great time on it!
The features seem to come quite easily, and in fact I had 2 in succession go all the way to the maximum 21 free-spins, only about 30 spins apart.
The first paid bet x119, the second (video below) x183.
With wilds everywhere (almost had a full screen of them a couple of times), wins are frequent - but 5 wilds or 5 top pay symbols only pay total bet x35 and there's only 11 win-lines, so you're never going to win massive on it.
If you don't mind your bonus rounds taking quite a while to play out, then this game is a lot of fun
I don't mind that myself, and in fact this is the sort of game I really like - a bit like Rival's slots; bonuses not too hard to hit, though naturally that means no really big wins.
I made £330 profit in 30 minutes of play on £1 spins... what's not to like!
Note: the feature takes quite a while to "get going" - only a few smallish wins in the first 12 spins, the fun really starts about 3:30 into the video...
KK