I bought the Harbor Freight random orbital sander and returned it. It looks the same as the Walmart one. I returned it because I hated the dust collection port and dust collection bag,
plus the vibration was unpleasantly strong. I replaced it with a Ridgid ROS from Home Depot. I like the round dust port on the Ridgid ROS. The dust bag stays attached if you use it, and it comes with a standard shop vac fitting, which I use most of the time. See my post #7 in this thread:
There were 2 versions of this in the store at the time I bought mine:
This one's dust port is rectangular an nothing will hook up to it except it's own bag and that's OK for small jobs. What I've found over the years is there is no standard size dust port and no standard size small vacuum hose, so it's a crap shoot. You need to have on hand several size reducers/adaptors to make the connection. Plastic bottles necks and other sleeves will work.
I made the mistake of buying 3 of them at the store and did not look closely at the package description. I ended up with 2 different types, the other 2 were not on sale and cost twice as much. I returned the 2 odd ball ones and got my money back, went online and ordered 3 more. They disappeared after delivery, went to my neighbor's house by mistake, sat there for a week on her table. I called Walmart to complain, so they sent out 3 more, no charge. She confessed to confiscating the 3 original ones, so I ended up get 6 in total, 3 of one type and 3 of the other.
My inventory of ROS has taken 25 years ...? to accumulate and here's what I have. They all seem to vibrate about the same:
Walmart Hyper Tough 2112 with rectangular port 2.4 AMPs
Walmart Hyper Tough AQ20020G round port 2.5 AMPs
Dewalt DW412 round port 1.9 AMPs
Porter Cable 343 round port 3.0 AMPs
The best sander I own is a Milwaukee 1/2 sheet, 6 AMPs ? no longer made. Virtually no vibration and cuts really fast despite being a 1/2 sheet. I learned about this sander from my friend who makes custom raised panel doors, who has two of them and has to do a whole lot of continuos sanding for production.