I've had several experiences mixing benzos with mxe. Works fine for me as it eliminates any possible anxiety caused by the MXE, but as others have said, it also suppresses some of MXE's effects. I tend to not remember very much at all from the experience either and that's with mixing 1mg xanax. This is to be expected as benzodiazepines are known to inhibit memory, as are dissociatives, and as they work through different mechanisms the effect is additive. It's fun for stumbling around at home, mindlessly watching crap online and spacing out to music. If you are prone to misbehave on either substances I'd be careful though, or at least have someone with you to keep an eye on you!