Disappointing Quality

When my old 500W drill from Bosch with an engine fire goodbye, I bought about 2 months ago because of the high quality expectations of the PSB 750 RCE.Im use showed up handy, light and powerful. Two negative points struck me immediately in comparison with its predecessor:
1. When drilling or screws with a heavy load can the drill spindle by hand insufficient festdrehen.Bohrer or screwdriver then sometimes slip through. The possibility of using a wrench turn missing.
2. The left-right slider is unwieldy to use when working. The small rotary switch on Haupteinundausschalter in the old machine was better.
When building a dog kennel electronics kept the load not work stand.Beim put the machine repeatedly aus.Nach a trouble-free exchange, I used the new machine to build a larger Vogelhäuschen.Jetzt showed again Aussetzer.Der motor hums, but no longer rotating .The electronics appears to be a problem with this machine.
I will now return the drill and another to buy me.