I've been using the DMR and haven't had any problem. I did tweak the bend a little to make it line up better, and I widened the groove in the roller with a dremel tool. I use 3/32 single speed chain, so no issue there. I also only use single speed cassette cogs (longer teeth) I haven't dropped a chain or had any problem with slippage in a dozen races and a ton of offroad rides. I am concerned about the bolts stripping, I try not to tighten as well as I would like to.
cannot say enough about the White ENO hub. Great hub on my MTB for the last 2 years with ZERO chain drop. Not ready to try SS in CX because that would be CRAZY!!!
My frame has track dropouts so don't need Eno hub, but i have heard good things about it.
I resolved my chain drop issue with a chain tug (not a tensioner - this pulls the hub back in the dropout, giving very precise tension control). It allows me to use quick release skewer (regular freehub with one cog and a bunch of spacers). I even use it on the bolt-on fixed gear hub.
I bought a chain tensioner from velosolo for a frame with vertical drop-outs, it lasted the racing season (with some nasty falls) without issue, the tensioner can be setup to lift or push the chain down