Proven quality costs, that simple.
Some are a bit more of the quality than others, usually shown in the cost of the system.
Keep looking, look as you are doing here for those who have applied and had a coating down for more than 2 years.
Ask further questions, like where they live, how old the concrete they put it on, etc.
There are some good ones, and some that are just a "looks good but don't hold up after a few years" on the market.
I didn't use this, although I like them, the good ones.
My "shop" is not for cars, and I live in an area with a lot of clay in the soil.
Put down as much as 8 in of concrete, lots of re-bar, etc for reinforcement and in three or four years, big cracks.
I used pavers, they have been two years, they heave, so they don't crack, and they look great.
I clean out the shop with a leaf blower and once in a while I will vac it.
I don't care if they get some stain on them, most I can clean up.
It's a work shop, not a museum.
Just my input, make your garage a work shop, and understand it is that.
As I said, I like these coatings, the 2 part urethanes, just wouldn't work for me.
Grumpy