"I've used Erbauer stuff for quite a few years - as an amateur I couldn't justify the high costs of the 'professional' gear and the Erbauer range is well priced for people like me.
This impact driver lives up to the Erbauer reputation very well! - it is light, very powerful for its size, and well matched to the batteries
I have been using it to bang 100mm x 8 screws into tannalised timbers and this driver does the job wiith relish - once or twice, it did stall when the wood was particularly hard, but when this happened I felt that I was close to breaking the screw!
The only mild drawback I found, is that the speed of the drill is very high when starting to drive a screw - I would have preferred a slower start when you first pull the trigger (hence four stars for features)
I have also scored four stars for reliability because I haven't used the driver long enough to fully assess this.