10/10 - I grew up listening to that song. Deep Purple was the first band I saw, as a wee lad of 8. My second major concert also happened to be Deep Purple [I think. It could've been the third or fourth] I find it the perfect song. In their shows, Steve Morse improvises that neat riff, really well. Ian Gillan's vocals are perfect and this is one of my favourite songs of all time. I also have the privilege of seeing both Jon Lord and Don Airey perform. Don Airey did this amazing improv along with Mr. Crowley and then broke into the intro of Perfect Strangers. Epic.