I hated it for about 10 minutes...
Now I LOVE it. The button clicks and Touch ID is so much faster. I used to have to wait a second on my iPhone 6 to get Touch ID going, now it works in like a 10th of a second. Wow. Love not having to slide to unlock now.
And the click was weird at first, now it's normal to me. I like it better than the one on my 2 year old iPad, which is a regular button.
Force touch takes some getting used to. I can definitely see the speed improvements now. The thing I need to get used to is moving icons around. I used to press firmly on the screen until the icons wiggled. I can't do that anymore. A force press and wait is different from a light press and wait. Email is cool. I can press harder to see an email and then let go, and move to the next email, look at it, let go. I can do that all with one finger, much quicker than opening the email, then clicking the done button.... I didn't think I'd like it at all, but it's changed how I interact with the phone. I originally thought it was a gimmick, I don't think so anymore.