Came off a few years of primarily riding the Minion DHF up front, with trimmed Wet Screams as my intermediate/wet conditions alternative. I spent last season on the Super Gravity Magic Mary, ran through a handful, and I can see why these have largely surpassed the Minions as an all-conditions option among the pros. They're essentially a trimmed spike with a larger volume. They roll adequately fast for a soft compound tire, with excellent edging grip and braking traction. Wear rate is about in line with other soft compound tires (similar to Maxxis Super Tacky, wears faster than 3C). The SG casing does give up some durability to a true dual-ply, especially as the casing wears out, but I've found that replacing them at reasonable intervals yields adequate flat resistance. FWIW, I have it on good authority that the Giant factory downhill team has been racing the SG casing with a run-of-the-mill tubeless setup successfully for the past two seasons. As for trail bike use, they're ideal for enduro racing, but for anything less demanding, they're likely overkill.