I've got to agree with both guys. If you want the best you can get, get the snap on. Mac is owned by stanley, who we all know aren't afraid to cut corners. All of the last several foreign made Mac items I've held recently had feel issues mainly due to reduced buffing quality on the chrome. A torx driver I had had plastic inserts in the handle with the size printed on them, and one of the inserts fell out. Kind of annoying if you can't see what torx driver it is quickly.
None of this has anything to do with their sockets, but if they make these kinds of cuts, eventually you'll want to get a socket replaced and you might be given a substandard tool.
If the price is a concern, I agree with the SK idea. For a LOT less money ($125-$150 for an SK 1/4" drive set with a little looking around) you can get a set that personally I'd rather have than a MAC. I have the 1/4" and 3/8" SK sets, and a complete set of metric 1/2 SK. I get as much snap on as I want for great prices, and I still do not plan on upgrading my SK's. They are really a great value. I figure if I break one I can:
1) hope ideal will replace it
2) buy one online or ebay (probably the easiest)
3) buy a snap on to replace it
Either way I've got a set of premium sockets and about $400 extra in pocket.
Personally I believe SK are as good or better than Mac anyway. If you do go with Snap On you could probably find a new or near new set for sale on ebay or in the GJ classifieds for half the price too.