The fats in MM are of the healthy variety. Drink up.
I don't care if it's good fats or bad fats, I'd rather not ingest that much over any given time period. I think the protein to fat ratio is a bit off, IMO. It's different than other powders, and that makes is better but on the other side of the coin, if you're making an attempt to get 60g of protein per meal, that means you're taking in 30g of fat (total, again, good or bad I'm not looking at) for that one meal. You'll also have 16g of carbs added in, which with that much fat doesn't make for a great drink....
...killer taste though! MM has the best flavors, options and taste, hands down IMO.
If you are carrying the lower fat version around with you during the day to sip on, forget it. It coagulates. It's nasty. Stick with the regular version or just use Myoplex. Its a better MRP and tastes good
I don't buy the stuff unless I'm starving and don't see any better option. In either case, I would never carry it around with me, as I usually eat everything there on the spot after I buy it.