Use for 2 weeks is OK but not much to get an idea about a product so simple it's still enough!

Particularity: it is childish to use.

Value for money: without trying the other products, I would say that for 150 euros well worth the money!

In conclusion, after trying to see notices on this site and have called several other dealers, I bought "blind".
And I'm happy, frankly apart from the usual fly ass pounding on the loss of his guitar sound (the slamming, brightness, sustain, etc ...) I do not see any notable changes that can bother me with my guitars (Gibson Les Paul Studio, Fender Start Mexican).

So, in my opinion, to buy the closed eyes.