This is for first episode only, I was really looking forward to this based on seeing the HBO trailers for the last 2 months. Unfortunately it's not exactly what I thought it would be. The story, so far, is a bit of a convoluted mess and the stars don't have any chemistry with each other, especially any that I'm interested in watching. HOWEVER there is a lot of potential and I'll keep watching and revise my rating as the story develops.
Update: After second episode I'm just not digging it. Why would I spend time watching a couple, who have left their current partners, try to have an affair with each other while being completely dysfunctional and lacking respect or even affection for one another? It's an interesting concept very poorly executed. It's not funny, it's actually cringe inducing. Phoebe Waller-Bridge, everything you touch does not turn to gold. Changing review from 5/10 to 4/10 and likely won't watch the remaining episodes.
