No worries Mate, they're a reputable company and their customer service and comms are great and you'll get peace of mind when you shop with them as you're updated every step of the way.
TBH I wasn't that keen on the G2 to begin with but it's grown on me, I'm appreciating the little extra touches that LG's baked into the ROM such as QSlide, Quick Note, Wireless storage system where you can wirelessly transfer files. It's brilliant, I've had a lot of smart phones but this is possibly the best out there at the moment.
I'm going to be honest the camera good but not as good as the S4 in terms of consistency, however once you get to know how to take shots accordingly then they're fairly decent. I still prefer the S4 pictures though.
The picture below was taken around 4.30pm when light was low and it was quite murky, I had to fire off the flash.
The battery on the G2 is the most impressive thing, it lasts for ages, I also love knock knock it's such a simple feature but so addictive and it becomes intuitive to use just like the buttons on the rear of the device.
Dev support is getting better, on XDA all manner of ROMs are cropping up and it's increasing, you have PAC MAN ROM, Carbon, PA, CM10 - all the main ROMs.
For storing you pictures you can use Dropbox, you can basically allow Dropbox to upload your photos as you take them or even use Google Drive which does the same thing.
As for the back yes it's shiny and if you get a black G2 you'll be forever wiping the fingerprints off, so I recommend you get a case straight away.
I recommend the case below from Diztronic, I've got it and it's excellent, superb protection and it's grippy.