I'd have to say in contrast that repeated MXE use ultimately has a very negative effect on my mental health. The more frequent my use is, the more I end up spun out. A few times I've had sudden emotional breakdowns on the stuff that leave me in quite a bad way. I'm alright once it wears off, but doses in excess of 70mg have potential to mess me around. I'm not an unhappy person really, but MXE often leaves me in a low mood which then leads on to bad experiences like that, which in turn genuinely impact my mental health.
MXE is truly a powerful psychedelic that has the power to make or break any individual's mind, in the same way that LSD, psilocybin, DMT and the like do.