Being a "Florida gal" I've had so many good and bad key lime pies! The best is sold in Davie Florida at a Orange Grove called Spykes Grove. They sell Terry's Key Lime Pie..to die for!! I ship them to friends at Christmas time, expensive but worth it!! I would post link but restrictions so PM if you want it.
The basic recipe was posted here already. Until recently you didn't have to bake the pie, no with all the raw eggs scares you really should. I think it's better without baking so sometimes I will play russian roulette. Here are some substitues that I've used instead of the raw eggs: Use a softened 8 oz cream cheese and refridgerate or my favorite use a small container of cool whip and fold into cond milk and kl juice then freeze! It's awesome on a hot day.
If you really want a good pie make your own gram cracker crust. The premade ones are okay for a quicky, but homemade is way better!!
As everybody said the pie taste is based on the limes. And if you like a tart pie then add more juice. Right now our local store (Publix) has key limes..guess I will be making a pie this weekend.