Im not impressed with mine either. But it's a good starter watch. I guess cause I probably wouldn't have shelled out 300$ for a good watch, but now I will. Maybe after a year, I'll get a new one because I hate wasting money.
Besides, sleep tracking isn't that valuable.
I am also disappointed with zepp. I still can't pair it with my scale that does body fat and such. I can't even enter in that stuff manually. It's such a tease, lol.