Good sockets (all types-chrome, impact and universal are all excellent)
Good wrenches (all types-ratcheting are Taiwan but good quality, new standard length combos are Proto ASD copies and as such have a nicer beam than the old school squared corners in my opinion)
Brand new USA made screwdrivers look promising and have been receiving praise here.
Double knurled extensions are excellent, available in both chrome and locking chrome.
Most other socket accessories are on par with the competition. They do have some interesting new things like socket extensions with a soft grip handle built around the drive end so you can use them like a screw driver, likewise they have locking universal adapters.
Good selection of pneumatic tools, the new impact wrenches in particular are very nice.
Home grown pear head ratchets are antiquated. Any round head or quick release ratchet is a rebrand from Italy or Taiwan.
Pliers are passable junk, but priced accordingly for a truck brand. There are a few rebadged Knipex and Channellock tossed in but by in large they're mostly Asian.
When it comes to their domestic hardline, cosmetically, they have some of the nicest chrome of any USA manufacturer. One of the few that have tried to leave the tint a bright chrome as opposed to the darker color that has become more common with the switch to the newer trivalent plating process.
Really nice storage, save the carts which are still following an old school design scheme. That is to say they have nothing with drawers down the entire length.
Basically if its stamped both MAC and USA its generally top of the line. If its stamped MAC and nothing else or MAC+Asia COO, just do a little research but its probably fine.