Soundwise for me they have been the best. I have MkIII Simul Class and a DC5 but alas they are heavy beasts so I only use them occasionally, they live in my studio. What l like is that they can be set up with a very convincing Vox AC-30 sound as well as the classic Fender tone. They also do an excellent rock tone, listen to Carlo Santana. I saw The Shads using them in 1982 and they sounded terrific.
The quality and build is second to none, the big issue is the weight.