I doubt they will be a huge disapointment. They will have the focusing beam which has always been one of the best things about them, which few other companies have. I have known many people who had a mag, including myself, and never heard one complaint about their durablity. Some complain about them, I have heard a number since being here, but no one has ever shown me proof of it, so until then I take it with a grain of salt knowing that every light has its proponents and detracters here, it is the nature of obsessive collectors, myself included.
Will they be the end all be all of flashlights, no, but then again what is, and where is it? If there was a single perfect light, everyone would have one and not worry about others. It doesnt exist, it wont exist, and every single manufacturer has their issues, especially with certain models, bar none.
For the price, I think the Maglights will be just fine, and be competitive with any other light in the $30 range. Will I get one, who knows, perhaps the 3AA , it might be interesting. I already have plenty of modded Minimags, or will after I get my SMJLEDs.