looking to buy some surfboard leashes

[gnarly123]

hey everyone, just got into surfing this year so forgive me if i sound like a total novice... i like to pretend i talk the talk but i frequently get it very very wrong!! so im looking to buy some leashes and im a bit lost... i had a ilttle shop around ebay http://shop.ebay.com/?_from=R40&_trksid=p3907.m570.l1313&_nkw=Surfboard+leashes&_sacat=See-All-Categories and twenga http://www.twenga.com/price-surfboard-leashes.html to see what the deal is but im still pretty unsure... is it all as simple as it looks? i just feel like im missing a trick...!!
any advice on brands, materials, stores would be massively appreciated, thanks y'all

[surf patrol]

Surfboard leash guide
How to attach a leash
Buy a leash here

[Dr Rev]