Metal work they are lacking far behind similar priced competitors and way softer. But for rough, and I mean rough, wood work they are quicker to drill holes. There isnt a huge need for a rough work wood bit in small sizes like these IMO. I had some but threw them, there are better bits for the price, including other Dewalt bits.
Sharpening wise you can sharped the bump on a drill doctor but have to free hand the edges making any metal drilling obsolete after sharpening them due to the difficult angles you have to do. But again for rough drilling they still would work.
Bottom line they are a home owner marketing hype that you should stay away from if you drill more then 6 holes a year.