Choose your answer: is the following review positive or negative?

My new favorite nail salon. First of all their work was impeccable. Mai is an artist. The salon was very clean. Everyone spoke english and could hold a conversation and genuinely seemed interested. Her son Nick gave me an excellent pedicure. It was nice that there was no up selling. Very relaxing environment. Will be back. Thank you . Oh snd they are open late :)

Select from the following.
a). negative
b). positive
b).