Unker i am another unker here too but completed my Master of Science... just not an MBA...
if MBA provide a path for your to progress further then by all means. many MNC co (industry are irrelevant because ultimately its business) when you move to management then having MBA is good. if your interested is very technical then its Msc not MBA.
Otherwise if its by your own initiative to expand your knowledge then you can continue or drop as and when you feel like it.

congratz ya.... feeling great right passing it especially u doing it part time...