I have been using Stan's for over two years now and have no desire to try anything else. I haven't used it on the Crossmax rims though, I do know a lot of people that have and they have been very succesful. Most tires do a great job. I have used Panaracer Pro XC's, Tioga Red Phoenix, several continental's and a few other tires here and there with very little to no problems. The only tires I would stay away from are Kenda's. According to their sales rep they should not be used with Stan's sealant. They will work fine for a little while but something in the Stan's actually breaks down the rubber that Kenda uses. I was very dissapointed when I found this out since my next set of tires was going to be Kenda Karmas.
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I may be fat but I'm slow enough to make up for it.