The Good: Very good acceleration and speed, hills are easy to go up as the glide lasts long. great handling brakes are sharp and smooth. Very light only 11kg. If you need a bmx for stunts i recommend this, but you may need thicker tyres to prevent punctures which were very common for me.
The Bad: with this bike i had to replace the inner tubes in the rear and front it was disappointing at first, however the tyres are thin so they're prone to punctures. Buy a new pair of 20" tyres and you'll be fine.