Scott Pendleton wrote a review of Continental Mountain King II - 29in on August 27, 2014
Familiarity: I've put it through the wringer
I switched to these when I moved from the west coast (dry, loose) to the east coast (wetter) and wanted a good all-around tire that would roll well, still shed mud, and grip well. I also was hoping it would last a long time. I definitely got all that.
I have 1500 miles on a set of the 2.2 in protection and you have to look really closely to see any wear. The tread has barely worn down. I run them tubeless with Stan's and I've had one flat in that entire time which easily sealed itself. I'm amazed by how durable they are, especially given the weight (the 2.2s weigh ~730g, close enough to listed). No, they're not the lightest, but a flat will cost me more time in a race than weight. They are on the smallish side for a 2.2, but not terribly so. I also have a 2.4 and that's about the size of a 2.4 Trail King.
Oh yeah, I race on these. I use them for training and racing, and I'm happy with how they perform; they grip really well (with one caveat) but still roll fast. I hate Race Kings because they have no traction; these have much, much better traction but not a huge rolling resistance penalty. If you're really concerned about weight and rolling resistance and don't have slick conditions at all, go for the RKs, otherwise these allow cornering without wizardry.
Now the caveat: they corner well, once you get onto the side knobs. The weird thing is there's a "dead spot" between the center tread and the side knobs, meaning if you lean them slightly you'll wash out as there's no tread there, but if you lean them hard the side knobs hook up really well and they grip and corner great. Basically, you have to adjust your cornering style to lean hard through turns, maybe harder than you were before. That took a few weeks to adjust to, though once I did I stopped noticing the dead spot, I just throw into a hard lean and go right through it.
Overall I love them and have two sets. I run 2.2 front and back on full sus, 2.4 front/2.2 back on (sometimes rigid) singlespeed.