Hi, Hook,
The only real issue is whether or not your computer can display a PDF file. Also, you will need access to a printer.
I used the eTicket for the first time two weeks ago, in order to avoid the ticket booths and go straight to the turnstiles, and it was great.
If you buy the eTicket, you will be sent an e-mail with a PDF file attachment. When you print out the PDF file it will print out a bar-code onto 8.5" x 11" paper. (The print-out actually displays the same bar-code twice; once at the top of the paper and once to the side of the paper.)
Just take the print-out to the turnstiles and hand it to the CM. The CM will scan the bar-code, and within seconds your actual ticket will be printed.
Getting through the turnstiles will probably take you less than a minute.
Re FastPasses:
Check out the "HydroGuy Tips Compilation" sticky at the top of this board, especially the links that are listed under "FASTPASS AT DLR."
Read the following two links first:
HydroGuy's "FastPass for Dummies and Smarties -- A Photographic Explanation" at
http://www.disboards.com/showthread.php?t=1186052
HydroGuy's "Getting the Most Out of FastPass During High Season" at
http://www.disboards.com/showthread.php?t=885132