It has it's cheezy parts, no doubt, but I always liked The Apple.
Yes, some of those scenes with Chekov AND the natives are a bit embarrassing to watch. But I loved the extended phaser v shield battle as the Enterprise opens her full phasers on Vaal!
I also thought it was sad that 3 security guys are killed, but when the natives attack, the skinny yeoman on the landing party knocks out 3 of the natives. Or was it 2? Anyway....put HER in charge of security and the hand to hand combat course on the Enterprise!