Got a pair of the Alnico II humbuckers in a Japanese 330 sort of thing. Very rich tone, mellow and woody in the neck, almost horn like in the bridge. These replaced several sets of GFS in succession, as I sought my tone.
Note: I play mostly cleans, and my ideal tone would be Larry Carlton doing rhythm on a slow blues, or BB king on lead.
Supported a band locally a few months ago and the lead guitarist had replaced the stock humbuckers on his Gibson Les Paul with Toneriders because they gave him a slightly toppier, les mid-range heavy, sound. He wanted that because the vocalist played rhythm guitar using a Les Paul and he needed to cut through the mix. For the price, and based on what little I've heard, I can't fault them.
I have a set of uncovered zebra Tonerider Generators. This is just my opinion and my experience could be totally different from someone else.
I go back and forth on whether or not I like them. Even though they are a good pickups (better than current stock Gibsons) I don't like the bridge pickup as well as Duncans or Dimarzios with a similar resistance (15-16k iirc). Too me, the Bridge pickup seems a bit muddy playing through my Mesa Dual Recifier. I tend to like my bridge pickups a little tighter/more compressed.
On the other hand though, the neck pickup is very nice and creamy. I can't think of anything bad to say about it. On par with a 70s era Dimarzio neck pickup.