Open_Source_Enjoyer
I use Organic Map regularly and find it very convenient overall. However, I encounter those two issues:
1) no live public transport schedule, especially in places I don't know
2) sometimes the maps are not up to date. Recently I created an OSM to be able to submit places that are missing.
3) As someone mentioned earlier, the lack of reviews can sometimes be an issue.
95% of the time I can use Organic Map, I feel it works even better than Gmap for walking in cityies, hiking or cycle, with the path being calculated on the phone itself.
When I really need to see reviews or for public transportations, I use the web version of Google Map