It is a good show.

Edit: after finishing all episodes I've re rated my review below.

So I was intrigued by this because Mr. And Mrs. Smith is a very famous movie (the second make with Brad Pitt and Angelina Jolie was amazing honestly).

At the opening, I thought the beautiful couple were Mr and Mrs Smith but then it became some other guy and some Asian lady. And as it progressed it was nice to see the take on it be they're all just Smith agent pairs.
Initially they didn't seem to have great chemistry but they tried their best. Eventually as episodes progressed they grew more on me. Their dialogs were more believable and their chemistry improved a lot.
They seem like decent actors but honestly there wasn't anything really great about their pairing initially but it kept getting better. They both acted well and naturally.

What the movie version did was have excellent deceit and chemistry between Jolie and Pitt. They are beautiful and handsome pairing and also feel believable and have that air or mystery/aura to them.

What was a lot better was the plot. There is an element of action/intrigue and tightness in the shots/direction that gave it a sense of urgency while seemingly being not in your face. The surprise explosion and then it was back to rebuild that crescendo.

Overall, I think this is a good show. Good actor and actress, good locales, excellent direction and cinematography and felt like a nice show.

I will watch it as it has good entertainment value.

Presently, I'll rate it a 8.5/10