Used to subscribe to Sound-On-Sound, and Future Music.
Cancelled S-O-S 1st, as at the time Future Music seemed to cover all my needs (and it came with a CD).
It also seemed to want to get the reader involved, and would feature readers demos, so you could hear how people used the gear they had.
However, it started getting too software based for my liking. Most of the 'artists' you never heard of (and never heard of again) most of the tracks supplied by said 'artists' sounded like a cat walking across a keyboard, the readers demos seemed to get forgotten (or more likely they where more musical and would highlight how bad the 'artists' track was), and about 2 yrs after cancelling S-O-S, I called it a day on Future Music.

Every now and then, I will buy S-O-S, if an article catches my eye, and to keep in touch with the gear. I'm currently in the market for an audio interface, so the adverts do have there uses.
S-O-S took over another mag I would occasional buy, Music Mart. It was more performace / PA /lighting based.
This is now know as 'Performance Musician', and again, if I see something that I might find useful, I'll buy it.