I've had to remove a lot of the stuff from mine because, turns out, when I hit certain modifier'd key combos with my left hand I tend to rest my right ring finger at the top of one of the number keys... close enough to the touchbar to trigger it. Didn't know that about myself, but now I do, and I've had to clear out about half my touchbar to keep it from being a problem. Turns out if you press "play/pause" on there, it opens iTunes. Took me a while to figure out why that kept opening for "no reason".
Yeah, it's been a net-negative for me. I never use it for touchbary-stuff (I don't even know why I would) and it's worse than real buttons for everything else. The fingerprint reader's OK I guess but is far enough out of the way that it's barely faster than typing my password—it needs to be toward the bottom. I think the whole thing would have made more sense as an iOS/watchOS companion app for MacBooks. Would have addressed the "so... what do I do if I get used to touchbar stuff then am using an external keyboard for a while?" Though I'd probably still not have used it.
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