I always request wake up calls by calling front desk at hotel. I'm sure I'm not the only one to have been screwed over when the front desk forgot to call me the next morning. I found a couple websites that will place wake up calls for you. Has anyone ever used one of these? Have you had good/bad experience? Worth the money? (Added links to web pages of a couple of them below).

http://wakerupper.com/
http://www.mysnoozester.com/


Thanks