I'm using the G2 now for a few days. I have experience with several Android phones, ranging from HTC, Sony, Sony-Ericsson to Samsungs. My last one was a Samsung Galaxy S3. I sold the S3 in anticipation of the Nexus 4.
I bought the G2 as a spare, and maybe use it with my personal and work sim in it.
I'm very pleased with the G2. It's relatively fast, the screen is fine, although the colours aren't as vibrant as I'm used to, battery life is excellent and Vanilla Android is a joy to use.
Minor issues are
- the loose button, which resonates when the phone vibrates,
- scrolling through pages isn't as fast as I'm used to, it seems to stop as soon as you take your finger off the screen
- notification lights are a bit too intense for my liking
- colours of the screen aren't as vibrant as I'm used to
Overall I think this phone is a winner:
I love the speed, the weight in my hands, the battery life, dual sim, extendible storage and untouched Android.