I literally have no preference at all between the two, but am getting one of the two. Pros of the Lip-Lock being security vs. the ability for a thief to easily jack my seatpost if it was a QR clamp. Pros of the Flip-Lock being ease of adjustment without tools. I would lower my seat more often for downhill sections if it was a QR clamp. Also makes it easy to adjust the seat when family or the gf wants to play around on the bike in the yard. The reviews I've read tell me that the Flip-Lock begins to fail in wet/muddy conditions. I definitely don't like the sound of that.
What are your opinions?
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