This season continues "Bakuman" plot where it left in previous season. Mashiro and Takagi have finally made a manga they are satisfied with (PCP - Perfect Crime Party) and they struggle to make it better not to lose their place in Shounen Jack. They have not lost their dream of getting an anime adaptation, so Mashiro can marry his love Miho (a condition set in middle school). Takagi is supported by his wife Kaya (also met in middle school), while two of them compete against other manga-artist present in Shounen Jack, most of them familiar from previous seasons, but with some additions.
This season if a bit different from previous two (if I remember correctly) by being more episodic - there are several arcs that are almost independent between them (especially Nanaime's). But by and large, there are no much changes from first and second seasons, so if you are a fan of "Bakuman", you will be more that satisfied with it.
I cannot be sure because I haven't read manga, but it feels a bit rushed in places, like they had to squeeze too much material in it. But at least the pace is good and there is no dragging... Ending is as expected, but very solid. And I like how it is clearly showed that Mashiro and Takagi won't lose their motivation, even though they fulfilled their dreams. It is interesting how the author succeeded in having an shounen battle-anime feel when the story couldn't be less apart from such.
Characters stay the best part of "Bakuman". As I said, there are no many new additions, but we got to know older ones much more, and there are some changes in their relationships. Niizuma, who is on one hand very funny, improbable and exaggerated character, is shown to be very dedicated and consistent. I like how Hiramaru gets more serious, even though he is still hilarious - and Joshida makes him a great pairing. Also, we got a bit of romance, spread throughout the anime. Rest of the characters are also solid (Fukuda, Aoki, etc.).
It was very nice to see some modern mobile phones, and android references, too. But that can be expected since this anime was finished a year ago and is set in present.