I'm using both OBMM-Extended and Wrye Bash for managing the mods I want to play, but I stay away from OBMM if I can and only use it when I really need to use OBMM.
My first impression with OBMM was that was so easy to use it, then many hours (probably months) later I finally managed to rebuild the bashed patch myself and after that I'm trying to use Wrye Bash whenever I can. So if you want to learn of how to do things in Wrye Bash then I strongly suggest that you take a look at this Wrye Bash pictorial guide.
That being said, OBMM do have some neat features that other tools doesn't have and one of them is that you can view a NIF file in OBMM's integrated NIF-viewer plus create+extract+unpack BSA files too. Also, OBMM-Extended has an unique feature which allow you to update any installed mod that's hosted on Nexus online via OBMM, so there is no need to browse your self to death by searching.