I have the T10’s, T6’s & now the T12’s. I thought it was going to be hard for the T12’s to improve upon the T6’s as much as the T6’s improved from the T10’s, but they truly have. Battery life improved, bass improved (larger drivers), and overall sound quality improved. So the upgrade from tactile response on the T10 to touch control on the T6 is the only area that was a more drastic improvement, but the T12 still improved upon the touch control to eliminate some of the frustrating undesired navigation control issues that were experienced on the T6.I can honestly say TOZO is the sole company I have ever taken the time to write reviews for as well as the only company deserving of a FULL 5-STARS ⭐️⭐️⭐️⭐️⭐️ but I’m more than happy to do so considering how impressed with all 3 of my TOZO earbud models and the improvements made upon each new model. So much so that I have actually gotten them as gifts for a few close friends and family members as well.The one last important note regarding TOZO is I’ve also had interactions with their customer service team and I cannot stress enough how professional and helpful their customer service has been for two separate issues.This is why they deserve this review’s subject title: “TOZO = QUALITY + VALUE + SERVICE!”P.S.You can even check my account to verify that I have never given any other seller a 5-star review like this because that is the honest truth so you know it’s legitimate and TOZO truly is deserving!