I have had this Model 1000 Dowel-It jig for several years now and it still works great for aligning dowel holes. I find it to be very accurate as well as simple to use with centering marks that are easy to read. It's made in the USA and will handle stock up to two inches wide. This jig and a biscuit joiner are two tools that I use often for shelf making. I particularly like that there aren't any loose insert bushings to deal with on this jig like many other dowel jigs use. I'd say that 1/4 and 3/8 inch dowels are probably the two sizes I use the most, but this jig will also handle 3/16, 5/16, 7/16 and 1/2 inch when needed.  Overall, this jig has held up well to my use and for what I cost, I think it was a good value.