I've heard of them, but have never had any interest in them. I generally find JLB's vocals outside of DT in that era to be rough, and I'm not into proggier stuff outside of DT (are these both prog?) I didn't enjoy the Mullmuzzler albums for those reasons.
I've loved the "solo" stuff though, and hope we get another one sooner rather than later, as I prefer it to recent DT at this point.