I've used them. Got two Blues Engine PAF-styles on my Gibson Flying V, (got some more of those to fit to my ES-3) and a Steel Foundry (bridge) and Steel Foundry Overwound (neck) on my Fender Roadworn Tele. Also fitted a set of Vintage 6TS to a friend's Strat copy.

Really happy with the Blues Engines on the V (it previously had the Gibbo Ceramics on it) and the Steel Foundries are excellent - really got the Tele twang, bite and clarity nailed. Much better than the original Fender pickups.

The Strat ones were possibly less impressive overall but still a lot better than the stock pickups (but I've got a custom shop strat and a Jap strat fitted with some great Kinmans, so both have much more expensive pickups fitted so they had a lot to live up to).

I don't know how they compare to the Toneriders, but I'd imagine they'd be pretty similar - both in cost and sound. Both UK designed/Asian manufactured.

Here's their UK website. http://www.irongear.co.uk/index.html

I must say they their sound clips leave something to be desired, and they sound much better in reality.

I'm just about to order a Platinum 90 for the neck position of a USA Hamer.

If I had the money and inclination, I'd be tempted do some Iron Gear Vs Tonerider comparisons.