UP / DOWN-stick has too much play, so a fast response is not possible. Have the part apart and found that they could achieve an earlier contact and thus a significantly faster response time with a slightly thicker executed female contact on the stick axis. The larger female is just in work - they could not test. Otherwise, the panel is solid, has stable and buttons located ertaunlich stable and non-slip on the table (in front of the notebook). Basically, you can the part, if you're not picky, or something Bastel effort takes into account, recommended.
