It's perfectly fine for #2 HB pencils - I've not tried had the chance to try anything softer or color pencils.
After wasting money on some Amazon Basics manual sharpeners ( https://www.amazon.com/gp/product/B01D5B7JRM/ ) which kept leaving one side of the lead covered and / or breaking it altogether, I gave up and got this thing.
My only "complaint" after a week is that the reservoir doesn't hold as much as I imagined it would by looking at the picture. The shavings are find and super curly, so it was about half full after sharpening just 4 brand new pencils.
As far as improvements - Other than increasing the size of the reservoir, adding something to hold 2 or 3 pencils would be nice.I'm probably the only person who wants this, so I'm not holding my breath.