I'd initially replaced them a few weeks a go with some cheap "Tech Armour" protectors from Amazon. The fact that I've ripped them off, binned them and repurchased these ones says it all. There's really no comparison!
The anti-glare works really, really well. There's a bit of an odd effect on white or light backgrounds, a kind of shimmering, but you soon get used to it.
The fit is good, and I didn't realise just how nice and thick these protectors are until I received and fitted the Tech Armour protectors!!
The feel of them is also quite nice, though I'm having trouble trying to describe the difference. It does a good job of not leaving greasy smeary finger prints, unlike the Tech Armour protectors, and when it does get a smudgy a quick wipe sorts it right out - no liquid required! They just disappear.
They don't seem to scratch too easily either, again, unlike the Tech Armour protectors.
They're a bit on the expensive side, but they're definitely a quality item and they seem to last.
When phone upgrades are due, I really hope I am able to get Power Support Anti-Glare protectors for them!
I've only used mobilefun.co.uk a few times, but the service has always been very good. Fast dispatch and delivery etc. I don't think I have had to contact customer support so I can't comment there, but I would be surprised if there's anything wrong there!