The no-button glass trackpad is harder to depress, or click, than the "old" MBP single button. I've tested 3 of the new MBPs, and all three require at least 2x to 3x the force of the "old" MBP. I regret not having a true means of measure the force in Newtons, but I swear it's harder to click. Loud enough to wake up my wife (like I did last night). ** can anyone else confirm this? ** So I've had to resort to clicking by tapping the surface. I'm wondering if the mechanism can be tuned or hacked. The trackpad seems to be a sealed unit, You can see some details when you remove the battery, but I'm afraid to go any farther. The ifixit.com folks took the whole unit apart, but didn't go into (or under) the track pad unit. The new glass surface is fantastic though. Hard to describe but it's more effortless than the previous, slightly smaller surface.