I tried the sound machine at POP last weekend... The 'white noise' functions sounded very electronic, and there was only 2 choices- one didn't work for me at all, the other was a 'babbling brook' sound with some electronic sounding frog that got on my nerves after about 2 seconds. I didn't bring a fan because I read they had these functions on their clock radios at POP, but I must say I was sorry I left my little fan at home, because the white noise functions I heard were way too funky for me...
I wouldn't take the chance if I were you...