On Spanish Time Cell Phone Rentals

Not to be confused with the other Cell Phone thread....mine is a question about renting for just a few days. Has anyone rented from these folks?

http://www.onspanishtime.com/web/index.htm

Are they reputable and do they provide good service for calls within Madrid?

Thanks!

I'll "tread lightly" on this thread... I realize it's impossible to get impartial, objective feedback on the other Madrid/Spain message board - the owner of said message board rents the cell phones in question - so that may be why you're asking here.

NOTE to other message board members: I'd appreciate it if you'd send syzygy8 Private Messages on this topic if you have feedback. Thank you.

To be honest, I wasn't even aware that there was another Madrid/Spain Message Board! That's why I posted it here! Any help, private message or otherwise, is appreciated. Thanks.