Hi
I have had 2 sprays tans in my life-the first was with good effect altho the salon was a bit rubbish and ventilation was an open window (yeah, and I looked bad enough in paper pants!) but they closed down so I went to a dedicated tanning salon a month ago. The 2nd tan was ok but patchy: I wished she had asked me to lift my butt cheeks and my overhanging belly, as I had weird white strips under each, so then I didn't feel comfy getting jiggy with the boyf!
I would also check out what you stand on - my feet turned deepest brown - don't think they washed the rubber mat, and it took a week of walking round disney for that to wear off!
So between hiding my brown feet and white strips, I'd say just be careful.
Since hols, I have used Nivea Sunkissed skin every night and been very happy with it (241 at Lloyds at the moment!).
The strange smell is like chemically biscuits I think - something to do with the skin melanin reaction, I believe. the smell of Nivea is ok, not too obvious, and I put it on at night and shower it off the next am.
Best of luck,