Hi All. Thinking of getting a JB1 for my 7.5 GTI.

Burger Motorsport JB1 Tune – VW / Audi / Skoda – EA888 – AutoInstruct

Just wondering if any on the forum have some long term opinions on this device.
Noticable improvement?
Ease of install/removal?
Reliability/warranty issues?

Any my real world observations appreciated.