Yeah I try to use them as much as I can, but a few don't get the love they deserve in more recent years -- the Legacy being one of them.
I do my own work and repairs but usually end up playing my own builds more often than not. Although lately it's been more HX modeling related.
I tried many of other folks IR / Modelers; Quad Cortex, ToneX and Kempers.
Great sounding devices, but for me, it has the sound 85% in the ball park, but with tubes dynamics and feel of genuine tubes, like a 12ax7, IRs Modelers fall slightly flat.
I think when you do a "Capture " on those units, it's only a snapshot of the amp of that tube amp, at that moment.
Either way, modellers are great.
What made me view the weakness of IRs, is the use of a volume or tone knob from the guitar.
To my ears, the IR didn't have the gradual gain increase like a 12ax7 tube, it was like cooking with a microwave vs BBQing or using a conventional oven.
To my ears, the volume knob exposed the IR's hot, warm and cold spots, while the tubes in my tube amp collection ( or 2112 SGS) was more thoroughly cooked tone wise.
I had to use that analogy to express my opinion.
Who knows adding some thing like a VHT Valvulator 1 or a tube based preamp in the effects loop can solve that super super low tube simulation of a Kemper.
Then again results and opinions will vary with what the user has in their setups.