1. The display off the center as you can see from the image.
2. The seller has listed that you can set floating voltage, battery low voltage, discharge reconnect voltage, etc. and these are also mentioned in the user manual but when you change the values its simply saves it. Then it gets back to its default floating voltage of 14.4V no matter what you set.
3. USB can provide only 0.9A 5V. Thats a bit of a shame.
4. There is no backlight on the LCD. Also its not very good contrast.