I recently bought HTC Desire 820G+ .Nicely packed and comes with attractive pack. Previously I was using HTC Desire X I feel comfortable with that mobile, even in 5 mp camera it looks great. After dropping so many times display was broken.
this mobile is fast enough in compare to its price.in android htc is the only brand that works smooth with 1G of ram.htc sense works very smooth and has lower bug in android so would works smooth and soft with 1G of ram.(but other android brands need 1.5 at least).
and about gpu I have to tell you mali 450mp4 that used in this mobile is about 2times stronger than adreno 305. D820G+ is one of the best gaming mobile in this range but it’s better that you install ram and battery management for better experience and good luck