I've owned mine for five years and I love it. Each time I have improved some aspect of my turntables I have discovered just how good the Steelhead is. Changing from VPI decks to hot-rodded NOS vintage decks with Reed 3P arms. Ven den Hul Crimson Colibri. Brian Walsh doing his thing.
The Manley Steelhead will not hold you back. I don't claim nothing beats it for the price, but I do claim it would be next to impossible to think of it as a limiter/bottleneck.
Btw, many claim to have had hum problems due to the Steelhead and imho they are wrong. Once I jettisoned my two VPI arms, my hum problems went away. De nada. Zilch. Bupkis.
I don't doubt Mikey for a second insisting that for his system, newer more elaborate designs beat it. But my system is pretty "up there", just not Mikey level.