I use the K&M Harmonic Holder for my Thomann Chromatic Harp and i must say it's doing his job very well. You can easily set up the position you need and babaam... you don't need your hands anymore ;)
That's quiet a good thing for those who want to play the Harp and maybe accompany this with a guitar like me ;)
The quality is K&M standard, so very very good but there is one point which is negative: Sometimes when you want to remove your Harp, the holder may cause little damage (scratches) on your harp if you're not carefull. So for those who play very expensive Harps the K&M Holder may be the wrong thing but for those who want a good qualitiy low price holder for their low price Harp, like me, its perfect ;)
This is quite good, quite affordable. It's fairly sturdy, yet I have had a couple of problems with the right-hand joint, which sometimes comes lose or sometimes becomes to tight. Also it has sometimes slipped up the back of my neck mid-performance, which as you may imagine, is quite frustrating. The harmonica clamp however is quite efficient and aside from these one or two drawbacks it worth the money.