At a hundred pounds, this is absolutely amazing value.
Excellent resolution on a 4" screen, 1Ghz CPU and decent RAM, microSD for expandable storage, HSPA 72Mbps for very fast UK internet (its seems as fast as my ADSL at times!), and more...
Clearly at this price this won't challenge a Samsung SIII or a HTC One X... but you get a lot of smartphone experience with this G300. I held off for ages as the phones at this price were unusable when I tried them.
Browsing the web is pleasurable - even for a good amount of reading. The UI is fluid. The apps load fairly fast. Add a microSD card and add lots of apps / media.
The screen as I say has excellent resolution 800x480 (usually priced more than double) and the size is good too. Its brilliant indoors - but be warned, its very hard to read in bright sunlight.
The Android version is 2.3.6 - and a 4.0 is promised as the device is capable. Great - even better value from this investment. Huawei have done what most carriers don't do - they haent' spoilt the Android experience with too many changes, too many apps, too many things getting in the way, too many battery life sucking extras. The Android skin here is light, and actually useful - well done Huawei .. other carriers learn from this.
The bad - and there will be some at this price, but won't detract from the rating I give this because this phone should cost twice or thrice the price - the screen is not great in bright sunlight, and the touch buttons at the bottom are not always responsive. That's it! Oh - and I can't get the gmail app to sync when I want it to but that's an issue for Google as it appears to affect other phones/carriers.
I got mine unlocked for free at a Vodafone store - haggle and you'll get it unlocked for free.
Let me put it this way - if I lost this today, I'd happily get the same phone as replacement. That's a recommendation.