OBMM crashes and runs out of memory when installing large mods like OOO... and it is not under active development anymore either, unlike Wrye Bash's Bain.
I've never had such issues with OBMM , even when installing OOO, active development is a bummer, but I'm sure TimeSlip would allow another to take over.
OBMM for me, used it for a long time
Pros: Easy to use, most of the mods I use/want come in OMOD format
Cons: Does not allow for mod type grouping