I’ve done well with both Sloto and 400 Group. I really like both and don’t focus on either.
400 Affiliates has picked up for me recently and I like the way they have cross promoted (giving me credit for those players who move between casinos). I have at least one player that deposits at multiple casinos and it is easy to see that happen with their stats.
In fact, I would say the Rival stats system is pretty darn good compared with most… and better than any other gaming software’s stats.
That’s just my opinion.