Dh has tubeless on his MTB as well. He likes them, even though we DID experience the "explosion factor", which was previously mentioned. We were getting ready for a 44 miler to the beach and back. Because he's "too good for us" and needed a challenge, he rode his MTB while us mortals rode our road bikes (he pulled too!). Anyway, we were just about ready to go when a booming sound occurred, much like a gun firing or a car tire exploding ... only it was his MTB tire .. which spewed goopy stuff all over me and my friends bike!

It was freaky. Can't remember what he figured out caused it, but it didn't deter him from using them. It was a little freaky riding behind him that day, though ... wondering if his bike was going to explode again, causing us all to go down!

However, he just recently tried tubeless on his road bike and, after some frustration, decided to switch back to tubes. I'm not sure what the frustrations were, but I could ask him if you want.