"i use stilnox which is what we call ambien here in new zealand. i am a flight attendant and every now and then i need to reset my body clock back to nz time. zolpidem works well and no groggy feeling the next morning nor do i get the funny after taste like i do with imovane. i must admit though you really need to be ready for bed as its fast acting. only negative is if i need to use the bathroom in the night my partner tells me i end up walking into walls."