Yessir
I just switched from CrossMax to some wheels with Rhynolites and I am using the Stans system.
I started out trying to use some Michelin Wildgripper Comp S UST tires. Fuggetaboutit!
What I learned, first the hard way, then from e-mailing Stan is that it is virtually impossible to mount Michelins on those rims. I ruined one of my high dollar rim strips trying to wrestle those Michelins on there.
What you will find out is that the spoke valley or rim gorge (depending upon what different people call it) on Rhynolites is pretty shallow compared to some other rims, which makes mounting tires more difficult.
I am now running Conti Explorer Protection tires and Stans and the Contis are much easier to mount (although still pretty tough) than the Michelin UST's.
Another thing Stan told me is that Hutcheson UST tires are easier to mount than other brands of UST.
He also said he rarely uses UST tires with his system, it is designed to be used with regular tires.
Next time I need tires I may try, Blue Groves. I read lots of positive things about them on this board.
As far as the Rhynolite rims go, I am a clyde and finally had to accept that I need a beefier rim for long XC rides. I am really liking the rims other than the difficulty of mounting tires.
The Stan's/tubeless system requires a learning curve and it can be pretty frustrating getting tires aired up the first time. My experience has been, some tires seal pretty quickly and can be aired up with a floor pump and others are extremely stubborn and I had to find a compressor with an air tank so I could get a big blast of air in there fast. When you have that it goes well. It is one of those things where you need to read and follow his instructions carefully. It will save you some grief.
Stan also discourages the use of CO2 to air up tires with his sealant in them. He says it renders the sealant useless. Having said that there have been quite a few posts on these boards disputing that claim. A lot of users on here say they are using CO2 + Stans with no problem.
Hope this helps.
Wild Bill