Has anyone applied for this and if so, overall do you think it is worth (in terms of time and customs hassle) the cost and paperwork aggravation? I've pulled up to the border a few times and the Nexus line was either closed or just as long as the other lines. Granted, this may be the exception rather than the rule and since I will be flying to the US quite a bit in the future for business and pleasure I'm thinking of applying. Thanks in advance for your feedback.