I've been using these (40mm) for over a year now and I'm always impressed by how well they handle. I ride mostly dry, loose and loose over hard pack surfaces with plenty of tarmac in between. Excellent cornering which gives me plenty of confidence when I lean the bike over in turns. Rolls very fast on hard pack and tarmac. I've never used them extensively in mud. I imagine they would pack it up like any other non-mud specific tire. I have no reason to switch to anything else and will continue to use these.
I ride in Colorado and New Mexico if that helps your perspective.
I was hoping that this saddle would make so my hind end wasn't sick of the saddle after 50 miles of riding, sadly no joy on that front. It's no worse than two other saddles I've tried on this bike, but it's not much, if any, better than a Specialized Power Comp Pro or a Selle Italia X3. I'm starting to think that my tail is going to be ready to stop sitting on any saddle after 50 miles of riding in a day.
On the plus side, it's got that spider web look so admired by cool biker boys, so I can pose as a cool kid.
I only have 500 miles on this set of tires. No issues great tire.I have only ridden on dry hard pavement with light moisture. Grip is great. Rolling resistance was minimal. Not any more difficulr than any other tire to put on. Matter of fact easier than some. These replaced some Schwalbe marathons. The Terra Speeds are much lighter and faster. The schwabbe served their purpose of zero flats in 2500 miles. I bought them to replace some gravel kings that I had five flats on the rear tire in 3000 miles. I would buy the Continental Terra Speeds again. Jury is still out on durability, but I think they are keepers.
I just completed my second Unbound. Previously, I rode Schwalbe G-1s and prior to that, GravelKings. Both were OK - but I've had punctures and fortunately, it self sealed and I could keep racing. My riding buddies convinced me to try Maxxis Ramblers - so, Unbound was the debut. I went with 40mm given it had rained heavily two nights prior. They performed well in fast loose terrain and were comfortable on the long race. I just came home and cleaned my bike - to my surprise, there were literally zero cuts, gashes etc. None. Tires look brand new. I have never seen this after Unbound. I am a convert.