The 600 MHz processor in the phone specs means you should not expect too much from the device! Going in with very low expectations, the Huawei Blaze X3 performed admirably for an Android smartphone selling under 100 bucks. As is the norm these days, I started out by running Angry Birds on the X3, I've finished the first two levels without any problems! Games like Fruit Slice, Labyrinth life, and Gameboy emulator, which demand little from the hardware, perform well. Running Need for Speed Shift showed that this isn't the phone you would want to run demanding games on -- slow frame rates and poor performance makes it unplayable! That's not to say that the Huawei X3 can't satisfy gamers, choose your games wisely and you can enjoy them on the X3.
Regular Android performance was snappy though not excellent. Depending on how demanding an app is you may experience lags in closing and opening applications, though this is a performance hit found in all phones in the entry-level Android handset category. The limited built-in memory is quickly consumed by apps and it would be a good idea to set the SD card as the default download and installation media to avoid slowing down your phone.
The Huawei skin on Android 2.3 seems to slow things down a bit, when switching to the vanilla Android look a noticeable difference in performance was observed. The provided 3.2 MP camera leaves a lot to be desired, image quality is average and low light performance is non-existent.The typing experience was a little less satisfactory, though switching over to the stock Android keyboard or the fantabulous Swype keyboard (has to be installed as a separate app) made things significantly better.
Call quality was decent, though the speakerphone is quite noisy and substandard. The 1200 mAh battery typically lasts for a day with intermittent Wi-Fi and GPS usage. If you play games frequently for extended periods, battery life goes down further. Suffice to say that the battery on the Huawei X3 is one of its notable disadvantages, but it may not be much of a concern to casual smartphone users.