I disposed of all my 'disposable' consumer type miter saws years ago. Bought a CTD steel and iron saw. Not a slider, so that inaccuracy is lost along with some capacity. But the accuracy for miters is excellent. Set it and hold it. One cut or a thousand.
Bosch, DeWalt, Hitachi, Makita, etc. They are all in that same class. Festool may be better. I will confess to having a nice old Bosch in the shop for the odd tall or wide cut s we may need to make. But it is stored under the bench, unplugged - a sure sign or infrequent use.
The CTD saw (similar to an Omga) is cast iron, Baldor motor, common pivot bearings, off the shelf switch....is engineered to last forever, with just two wear points.
But, if you are square cutting to length, a good sled will be better and faster. We just got a Hunter miter fence that has all sorts of great features. That may be all you need.
I want to stay as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center.
- Kurt Vonnegut