I am a big fan of Katori Shingo but I've never really watched any of his dramas. Luckily, I enjoyed it. I thought that all of the main actors did very well. Though, I have to admit that my favorite character was the bumbling Komatsubara Susumu played by Ohkura Koji. I almost wish he was the main characters of the series.
If you do decide to watch the show, keep in mind that it is about relationships. Therefore, the story doesn't progress particularly fast. Also, there are a few throwaway characters that are brought in to either cause problems or just fill some time. Neither of these problems are enough to keep the show from being entertaining.
Also, if you've watched Boss, keep an eye out for the cross-over collaboration. Boss will take over the drama world!