I'm in chapter 3 and 9 hours of playing time so far. I've played the vita app for about 10 hours before starting the main game but I didn't use it to the main game in case it spoils the experience and I think I did a good decision.
The very first cut scene where Kazuma killed the real Sakamot Ryoma is a great for the start but other than that, the main story is not interesting so far. Sakamo Ryoma is one of the most popular person among Japanese and how his story has been introduced in the various media, novels, movies, TV shows, mangas and TV games
p), Ryoma with Kazuma's personality doesn't feel right and the releation between Ryoma and Hanpeita and his clan 土佐勤王党 is weird. But I'm still in chapter 3 it will be better and better as I follow the main story.
pros
+finally, you can save anywhere.
+finally, no loading when a battle starts.
+lots of activities you can do as usual.
cons
-the most of the new type of sub stories, the ones with the kizuna gauges, are dull and not fun.
-the fist fight style is more enjoyable than the katana style or the katana & pistol style.