I wassn't prepared for a very lengthy sit while the wires were attached to my body - having those all over and in fact man came into room several times to readjust and one was off in the morning.... I had him take a photo of me ! Don't forget your pj's and am wondering now if they would have let me bring my pillow from home? Rarely we stay overnight anywhere but if so I try to remember to bring my pillow - although once left it at a hotel. I ended up not purchasing the machine because of my age, other health problems and also to be honest I thought it would be like a little light oxygen mask I work in hospital once ... but this has to be tightly fitted to face etc. and I knew I would not be able to cope with it; however, it has helped many others not only to sleep but breath. Am still glad I had the test done but I feel I did wake up a lot simply cos not my own bed, strange surroundings and the wires; however, I think they measure not only tossing and turning but actual breathing - I should have researched it before the test. Best of luck with it... J.