Collet lock failed almost immediately, feels like cheap parts in there. Great tool and accessories, but after I fix it I am only going to use the accessories that can be hand tightened, not burrs or bits.
Fantastic improvements over the years. I have one of the original Dremel tools dating back to the '50's. This is really a complete small shop in a small box. If you do craft or hobby or wood work of any kind I recommend buying one.