Very good and cheaper ball head for a lightweight tripod

I have this ball head for upgrading an older,
bought slight Linhof tripod because my Manfrotto tripod
I often too heavy to take home.
The ball head is quite stable for its size and holds eg
the Canon EOS 50D with the lens EF 70-200 f / 4 L IS USM without problems.
The quick-change system looks like the Manfrotto system, but is smaller and
in my opinion, no worse than this.
The ball head has no panorama function,
but what I have expected even for this price.
The Friktionsknopf perform its function properly.