I have the Brother pc-420. Absolutely love this machine, it has done everything I have ever asked it to do. The harp space is 7 inches. Bought the machine new off of ebay. Found both the manual and the machine to be very user friendly, very easy to figure out how to use all the features. After having the machine for about 6 months, I ordered the extension table to go with it for $50...makes quilting that much easier.