How long have you use it?

last few days (I refunded my mind later)
What is so special that you like most and least?

The first time I used it I put too bcp (it looked like a meeting of the third kind between man and the fast-freight) I finally picked up the mtn good principle and I must say that good we slide a little better it smells good (lol) and maybe it increases the life of the strings parcontre but when it is too much (history to have an effect) when sliding the fingers of the box the other it sounds bad ...

I also tried it on my acoustic, it sounds no better after last trunk TFWP I dreamed.
Have you tried many other models before buying it?

Hey should not be messing around I know it exsist for a week ...
How would you rate the quality / price?

€ 9 for all a try right?
With experience, you do again this choice? ...

Experience where?