Oh yes! Very much so with both the M1.2 and 2.2. Both very highly capable and the M2.2 being the most powerful in monoblock version. It has a higher Class A bias compared to the M1.2, both are quite similar upon first impressions. Then when you turn things up on the M2.2 it really takes off! Both are designed for reactive loads, so ideal on panel type speakers, especially those notorious impedence curves found in full range stats and Apogee's.
Have auditioned these with Apogee Diva's, Maggie MG20, and Quad 2912's when I owned these types of speakers. I think the main reason Lamm is not mentioned much is simply because they're pricey. Their gear in Aus is top dollar, as everything else is in the highend...
Lamm's ML series, 2 and series 3, which are SE tube gear, is a whole other level and real top price. I've not personally tried these at home but had the opportunity of experiencing their tube gear at private demos. Although low in power output compared to their SS counterparts, they can really deliver some serious current & voltage that falls into that Pure Class A category of Single Ended design.
After extensive experience on their SE tube gear, is what motivated me to modify my CJ monoblocks towards a higher Class A bias.
If you can afford Lamm gear, it's pretty much the end game in terms of "fine amplification" it's an extraordinary performance! As I've mentioned on other forums, if not for CJ, since I'm passionate about tubes, I wouldn't hesitate one bit on either Lamm, Kondo Audio Note or VAC, they're all in a class of their own when it comes to top-end tube gear.
Cheers, RJ