Defender - great game or just irritating?

Remember being in the arcade in the early 1980's and hearing this incredibly loud game from the back? It was Defender, and I'll have to admit I SUCKED AT IT! Pretty good at most games in the arcade, but this one kicked my ass - but for it's time there was a ton of stuff going on...and it looked amazing (just crazy loud).

Arcade Game: Defender (1980 Williams) [Re-Uploaded]

A flying horizontal shooting game where you must protect humans from alien abduction before the planet's surface will explode. Along with pac-man, it's nne of the highest grossing arcade games of all times. Note: Previously Uploaded. Re-Uploaded for better quality.