I've had MM LED's since they came out and I personally have had no problems with them. As stated above, they're about the same quality as the incan MM's, i.e.: some rattles, usually need to be cleaned & lubed right out of the box, etc. OTOH, I run some on lithiums with no problems. Why EDC it? If someone borrows it, I don't panic (they are definitely not an endangered species). Its form and function works for EDC at work. The vast majority of bags or pouches that are out there are made to carry MM's, so other than the MM LED's being a bit longer, they fit, too (look for bags/pouches with light tubes that are open at the bottom). BTW, get the accessory kit if only for the anti-roll cap. Another tip: wrap a bit of reflective tape around one to make it easy to spot when you drop it and to make it stand out from someone else's.
Just a few comparisons: The RR 2xAAA is loose and needs an o-ring after only about a year, but is light weight. The Inova Radiance 2xAA seems to be pretty stout but for some reason that I can't put my finger on, I almost never EDC it -- well, I don't care for the switch, but that alone isn't enough of a reason to just use it as another "house light." The Eveready LED pen light (with lithiums) which should be a no brainer for a light to EDC anyplace just sits in a drawer -- hmmm, maybe move it to a pen slot on the FatBoy? You can never have too many lights in/on a Maxpedition FatBoy.
So, no they are not the ultimate light, not even within the price range, but with lithiums and an anti-roll cap, they work for me as an EDC that's cheap & easy. Good for leaving in the glove box, too.