Although Mr.Green may not be 'shining' in this particular forum promo, according to what i've read so far, i have to say they are currently pretty much my favorite...
Withdrawals are instant most of the time, no matter what day or hour. and they have an awesome player to player type competition going on with their Reel Thrills..
This is great for a low roller such as myself - especially since i love Netent Games
If the latter doesn't apply to you, then those Reel Thrill tourneys probably aren't for you, as they are basically 15 minute events, where you fight with players for the top spots, which all pay a number of Free Spins: you are wagering/participating with cash spins (can also have Bonus Funds in play), so whatever you hit to score points with, is added to your actual balance as well. If you make a spot, the Free Spins are added to be used at your leisure (they probably time out after a fixed period, but i never encountered that before, as i always play them after i either cash-out or lose my balance), serving as a back-up of sorts.
Sometimes you win some extra cash, and Free Spins, sometimes just cash, or you lose..but to me, it's a great way of playing. All the Slots that are added, can always be played at the lowest denomination, and the point system is based on the highest x bet, averaged over 20 spins..
The wagering is 35x iirc, but that is not unfair in my eyes, and i have made the WR on those FS quite often..
I like the idea of second chances, so most Bonuses i partake in nowadays are 'cash first, bonus second' Match-ups, and promo's and tourneys like the above.
So, i would say Mr.Green offers a nice bonus and reward system. Their staff is overall also quite nice and helpful, and in my experience generous enough towards loyal players, for the occasional freebie.
The promo Robby referred to, is part of a large scale promo, which so far has had amazing deals..big prizes, loads of tournaments, extra Free Spins, raffles and whatnot, so i suggest the critics to take another look, as i feel that if you are a low roller like me, love superfast WD's, and dig a lot of extra chances for more playtime, then they are quite frankly on point!
Just my 2 cents ofc.