Last year I wrote about signing up for Clear, a registered traveler program. I've flown enough to make it useful flying out of Orlando, but my most frequent destination has been Seattle and so far there is no Clear portal there - so only helps on one half of the flight, but in practice the line in Seattle has never been more than 5-10 minutes. I just hit my one year anniversary and as I considered renewal it just didn't feel like it was worth the $175 to keep it for another year. That's a value judgement, just didn't seem like it delivered enough value for $175. At $99 I'm wavering, at $49 it would be an easy yes. I'm sure I'll have cause to regret not renewing here and there, but for now I'll stand in the line with everyone else.
I think they could make the service a lot more compelling if the Clear card really gave you a break on security. If having it meant not having to take off my shoes and take the laptop out of the bag it would go a long way with me, just the reduction in the hassle factor. It would also be a lot more interesting if they supported more airports.