Missouri Star isn't calling it the OLGA anymore...I'll bet they cought heck from Olfa ;) Their reviews are skewed too, as you have to read them all you can't check by rating.
Big pass for me, Olfa ergo all the way.

I started using the 45 and 60 quilters select, love this cutter. Alex Anderson has a video showing the use and easy blade change. Easy tap blade close is now second nature after cutting.

I took a rotary cutting class from Omnigrid some years ago. No matter the style of cutter, it works best to hold it it down, like to sink in the floor to cut not hold it to cut across the floor.

I' having this problem too! Changing blades did not seem to help.

Cutters have plastic parts and they do wear out of shape, slip out of place, and get stress cracks. Depending on use some last for a few years others for about a year. That is the life expectancy for a rotary cutter. After seven years plastic starts to deteriorate that's why baby car seats expire.

I have been using the new cutter with ball bearings for about 2 months, so I am disappointed that it appears to be wearing out already by unscrewing with every cut.

That is disappointing. Have you tried putting Elmer's School glue on the screw and then tightening? That may work to hold the screw until needed to put in new blade. I did this with one of my Olfa cutters. That screw kept coming loose after a couple of cuts. It didn't take much effort to unscrew with the glue but it held the screw tight. After I thought I got my money's worth using it I tossed it.

I've had my three ergonomic olfas for at least 30 years, no wearing out at all. I use all three sizes all the time.
I had a gray and orange fiskers that wobbled when it cut, pitched it.
Gave the martelli away, it wobbled, probably I wasnt holding it correctly, but I didn't like it, old dog and all :)

A couple of excellent articles on caring for your rotary cutter:

https://quiltingdigest.com/how-to-pr...XIYjpO7N8rpJ28

https://www.allpeoplequilt.com/how-t...roubleshooting

I guess any tool massed produced is bound to have a dud ever so often. I have other Olfa's that are years old and still working just fine. I have too many cutters, all brands. Last count my basket had 21 cutters not counting the ones in travel totes. In my defense I use to get one every gift giving occasion from family, win at door prizes, use to be they were sold at high discounts from reps when doing demos at quilt shops. Even have a few that were hand outs at quit big quilt shows years ago. Remember getting the hera markers in quilt ad mailings? And the Seam Jumper?