Great show. Have been enjoying season 3. There are a lot of shows that I watch that don't get a lot of buzz or discussion here which is a shame. This is probably the most deserving of them.
The way they transition between languages and accents based on the perspective of the characters is one of the best done parts of this show. I also enjoy the slang they invented for the show.
Some of the actors are a little wooden, but some of the actors are pretty darn good. (I'm going to use spoiler tags for my discussion of the actors because some of it indicates that characters may still be alive, so read at your own risk) Hoon Lee (Chao) is phenomenal in everything he does, this is the 3rd or 4th show I've enjoyed where he's cropped up. I think Olivia Cheng has been excellent as Ah Toy.
I agree that it's gotten better as things have gone along. Tobin has grown into his role a bit (Young Jun), and Jagger continues to kill it as Leary (literally and metaphorically).
I just wish we had more Bolo, (Season 1 spoilers only). The one-off episodes are the best part of the first two seasons.