Ok, here's a "testomonial".
I have two Ag's that couldn't shoot anywhere near up to their potential until I put a "Tuna trigger" in them. I could have bought the "other" trigger, but reading around the Airgun websites, it didn't take long to realize that I would have spent more for the "other" trigger, but found out that the Tuna trigger comes with GREAT back up should I have any questions. The other trigger only comes with a disclaimer that I'd be on my own if I had any problems.
I did have a problem with my first Tuna trigger installation. It was a "glich" concerning being able to download the instructions, which Bob (Charley-Da-Tuna) being the considerate person he is, promptly fixed the problem and responded to my e-mail concerning it, within the same day. I know I wouldn't have recieved such good service , even if I paid more, from the "other" trigger.
Not only is the service good .., as you would expect, the Trigger is GREAT too !!!!
From a former Captain Varsity Rifle team and a former UDS ( Unit Designated Sniper), I won't buy any other Airguns that I can't put a Tuna trigger in !!!
Paul.