Just wanted to share about my journey with the M90 pickups in my Sidejack Pro DLX. Initially, I didn't like the pickups at all, and strongly considered changing them out.
After playing around, I discovered that since these are so hot, the height adjustment completely altered the tone - not just the output level. I found the perfect sweet spot for both p'ups, and now I LOVE the tone I get from these. Not quite humbucker, not quite single coil. They can really do it all with a good overdrive and comfortability navigating the tone/volume knobs.
If you're in a similar situation, give this a try. Your sweet spot might not be the same as mine, but there's a ton of variability in how you set these pickups!