Nexus Mod Manager is impressively bad. The interface is insanely laggy; select a mod, wait a second, list starts to refresh, wait a second, list finishes refreshing, wait a second, the mod info shows up. It's really easy to do things by mistake because of the lagginess (and probably just generally poor quality of programming). It has multithreaded downloads, but even these are messed up. Every time I tried them about 50% of the downloads got corrupted.
