It's pretty hard to even guess whether a particular amp will be liked or disliked by anyone in a particular system.
I know someone with two systems, one in a small room and a larger system in a theater room. When the small system was run with all Naim equipment, playing either Sonus Faber speakers or Spendors, it sounded very good and sounded completely off and lifeless with very pricey Hovland gear (Radia, HP 200). But, the big system (Sonus Faber Anniversarios) sound much better with the Hovland electronics. Same listeners so taste is taken into account. Room acoustics, system matching, etc., all come into play here.
Naim gear is, in the right implementation, very good sounding for solid state. As people have noted above it is not particularly high-powered, but that is because power comes at a price sonically. Also, Naim amps do require compatible speaker cables (low capacitance, higher inductance) because the amps don't have an inductor at the output.
I tend to like lower powered gear myself (high powered tube amps are particularly offensive to me), and suspect that a lot of people look to higher power to provide impact because other gear is lacking. I find so many of today's highly regarded speakers too lifeless and constipated sounding and incapable of resolving detail at lower volume.