WebMD was a great help. I'll hit the high notes, but you can read up on it if you want to know more. Xylitol is naturally occurring and used as a sugar substitute. Xylitol is also said to prevent tooth decay and can act against some bacterias that cause infections. When it comes to The Lab 22 (Mint), the flavor description says, "The LaB 22 Slim White Mint comes with Xylitol - a natural and tooth friendly sweetener. The taste is that of fresh mint and vanilla flavor." This product comes in a 16.6 gram can with 24 portions, for 0.69 grams each. The nicotine content is 11mg/g (1.1%), which breaks down to 7.61 mg/portion. So while it may sound strong at 11mg/g, it's actually about as strong as a regular strength portion in the nicotine/portion amount.
If you're a health conscious snuser and dig Xylitol, this would be a good product to check out. As far as flavor goes, it's pretty decent. It doesn't stand out as amazing by any means, but it's still a pretty good tasting snus!