This post seems fairly legitimate (google the number) and the vendor in question is a sponsor unless I'm mistaken. Unusual to see a first post on a new account which is an endorsement of a product which is not spam though.
I've looked into this style of wheel before, and been tempted. A buddy is running a multi tip wheel on an SC85 and loves it. All these styles of wheel have the teeth staggered in depth, unlike the symetrical wheels where they are all the same depth. I'm running the older style of wheel on a 25hp self propelled. The staggered teeth design means that when you rock out, only a couple teeth are ruined. So you end up losing less teeth over time, plus this style of wheel seems to make better use of horsepower because less teeth are in the cut at any one time, kind of like skip chain on a saw. The teeth on offer are sometimes quicker to change, and sometimes different in design like the multi tip teeth.
The downside is the cost. I keep holding back even though I know it's a better system because I just don't stump much. I've had my machine a year and it's still got less than 100 hours. I've still got the original 3 sets of teeth it came with. They'll probably last another year. It would take me 10 years to recover the investment cost of going with one of the better wheel/tooth systems, because I dont grind much.
For my buddy who grinds all the time, the multi tip has been a big time and money saver. He doesn't sharpen, just keeps grinding. Can't do that on a small machine. When the lead teeth crap out he changes a couple. Even though the teeth are more expensive, the overall cost is lower than running standard teeth because he doesn't use many. Plus the grinder really is quite a bit faster in the cut and the teeth last longer.
If you're thinking of changing wheels, contact the manufacturer and they can often hook you up with someone nearby running what they've got so you can take a look and get some feedback. Lookout for specials too. Multi tip does a special every couple years where they give you the weel for free if you buy a box of 50 teeth, which is a saving of about $500 from memory. It was still about $1500~$2000 to buy into the system last time I checked. That buys me a lot of standard teeth.
Shaun