I'm an amateur/beginner woodworker. and just in the process of acquiring tools. I've just got the K5 and stated working with it and so far so good. I'd like to see 1/2" size screws and matching size in the sizing jig, for thinner boards. as improvement, but other then that I am very happy with it in contrary to the Multi-Mark Measuring tool. which has nice concept but unfortunately I like many others complain about the tool not being tight when measuring 90 degrees, and it has a few percents of loose movement. To be fair Kreg people offered to replace the product, but since I am working abroad now, this offer doesn't hold much water in here and mail it will cost me so much more. so I'm taking rain-check on it. Anyway, not to spoil it I will most definitely recommend the K5.