bought it expecting not much, never used dowels or biscuit jointers or these, however its deceptively good, accurate and effective. Made a 5ft diameter mahogany table and used this on the underside of the table top to speed up the edge jointing of 9 x 1'' 5'6''mahogany boards. still used cascamite and gentle sash cramps but this little beauty turned what is normally a tricky stressy operation into a fast doddle. have since played around and tested it for various joints as shown in the guide. Im a pretty good joiner / chippy and this serves a purpose. i also bought the trend matching cutter to make plugs for the holes [80 of them], sliced them off using a fine flexible sawblade and that left a good finish also.