Doubtless the Carys are better, but out of my price range. Antique Sound Lab saves money by Chinese assembly. These things are heavy, nearly 50 pounds apiece. Two of the tubes didn't survive shipping, and it took a couple of tries to get the complete set. I had to place them fore and aft, and build an extension.
Build quality is solid and good, with gold-plated connectors and a digital readout to adjust bias.
It is a little different than their illustration. There is also a hum adjustment I didn't need to touch. Documentation is poor, but the distributor was available for my questions. They take about a minute to warm up, but almost 20 minutes to achieve optimum sound. At first the highs sound a little too prominent, and the midrange thin.