I was suprized to learn just how expensive those NoExpire tickets are...
For our family of three, it cost about $600 for tickets for 5 to 7 days. Cost almost nothing to upgrade to 10 days. But the price soars to $900 to upgrade to No Expire.
When I consider that I just booked a 7 night stay at Pop for my family of three for early Feb 2006 for only $1,110 (room, tickets, hopper, water park, taxes), I just can't justify the extra cost.
The "problem" is that No-Expire costs $10/ticket/day, including the days you use it during the basic 14-day window.
The No-Expire would be much more reasonable if it was $10/ticket/UNUSED DAY (i.e. at the END of your WDW trip, allow us to spend $10/ticket/unused day to upgrade the rest of the ticket to no-expire). That way, I could spend $600 to purchase 10-day ticket, use 5 days, and then upgrade the remaining 5 days to no-expire for $150.