We joined our first photopass share last year and it worked great. I think with the number of people in our group the total individual cost was about $18 which is a much better deal than paying over $100. Our leader assigned each of us a day after our trip to upload and edit our pics and after everyone was done I think it was another 2 weeks before receiving our CDs. The only "drawback" is that you have everyone's pics and photopass automatically separates them by park so it took me about 15 minutes going through the CDs (we had 4) to copy just our pics onto our computer. Just a little extra work on my end but again so worth the savings. The budget board usually has several threads based on when your trip is.
Laurie