yung convenience ng NMT is if you are really into a huge collection and want everything in one place and on the fly. kahit pa BD.ISO yan, iba pa din ang dedicated BD players, wag ka lang magreklamo pag may region codes or firmware upgrades required on your BD player.
Plus side ng NMT, it keeps things simple for us to search our library. Do you miss the covers ng BD mo? or would want the exact BD cover sa NMT, aba eh sa realtek madali lang yan, rename mo yung lahat ng cover mo with the same file as your mkv, ayun, you will see in your thumbnail movie list yung files more are iconed with the BD cover from your favorite IMDB.org or blu-ray.com covers.
Eventually, I went to NMT+ BD combo route, not for savings (they are darn expensive vs. buying the two stand alones) but for the region free switching. I was to plunge with another one this year pero since after testing with 3D bluray playback di pa siya ready, eh tsaka na, i'll let it mature first.