Works well, solid investment.
As a solo performer, I've looked at a variety of iPad stands as an alternative to a music stand and huge fake book collection. After comparing features and quality, the K&M stood out as the best overall soution on the market.
Soliidly constructed from quality materials, I've found no compromise in performance or durability so far over the first couple months of regular use. The ability to quickly rotate the display on the fly from portrait to landscape, although not used often, is a definite plus when compared to the other builders' requiring the removal of a screw to rotate the plate. The intelligent design of the clip positioning provides for access to the iPad connection port so your device can be connected to power or display output during a show if necessary.
Attachment of the holder to a mic stand is easy via the standard threaded connection, or through the included extension clamp. The location of the hinges and clamp allow you to place the holder virtually anywhere on your mic stand and still have a clear view of the display. Recently, I've found it easier to place the holder on its own second mic stand, clamping my Peterson tuner and Bose T1 module to the stand as well, and making my actual mic stand less cluttered. Either solution works well.
Although the K&M is not the least expensive solution on the market, I would rank it as one of the best out there and definitely well worth the few extra dollars.