Recently bought Dreame H12 during 2.2 sale and got a free Xioami 3C air purifier
It quite good with 35 mins runtime

My advice to you is to find one that have a large CWT.
In the case of H12, the CWT would run out first before the battery

I chose Dreame instead of Tineco coz I used their V10 stick vacuum before.
My Dreame V10 lasted longer than my Dyson V11 Fluffy
My Dyson had numerous issues with reliability such as trigger patah and canister hinge pecah

Since Dreame and Tineco charges arm/leg for their cleaning solution, go and get the knockoff plant-based cleaning solution elsewhere
On shopee there are tons seller selling cleaning solution for robotvacs