Having had various iPhones since it first came out, this is my fifth charger. Typically the plug on them drops to bits with repeated inserting and removal, once leaving bits of metal trim inside the lighter socket which blew the fuse!
Often the power delivered by a cheapo charger isn't up to the job, taking ages to give the phone enough juice to switch on again, if you've run the phone flat.
The Griffin doesn't have these problems, it seems well built and solid, plus gives out enough amperage to charge your phone as quickly as a wall charger in my experience.
Another big plus is the flip open lid that reveals a socket whereby you can 'daisy chain' another gadget - for me it's my Tom Tom sat nav. As others have commented, this does make for a long plug, so you do need enough space between the 12V socket and the gear lever.
Excellent product, well recommended.