In response to some comments, the unit is quite small for a push pull amp. Given its small size it is a very heavy unit, due to the custom, hand wound transformers used in the unit and all steel construction.
The power output is quite good for an el84 based amp. Yes, you can get more power out of el34, 6L6, and various other tubes, but the el84 is a fantastic tube that when properly utilized will sound better than most el34 amps, which tend to sound grainy. Also, the amp is not designed to squeeze the most power possible out of the tubes; running them at their limit shortens their usable life. The amp is designed not for maximum power output, but for great sound and long life. For most speakers, 15 tube watts is quite sufficient.
Yes you can get other amps with more power at this price range, but you must consider the following: Is it hand assembled using point to point wiring, or does it use printed circuit boards? Is it serviced in the USA, or do you have to ship it back and forth to China (at your expense) to get it serviced? Is it designed for durability and long life, or is the plate voltage maxed out to gain more watts, at the expense of sound quality and durability?
This is a quiet, well designed, and well built amp. At this price point, you won't find another hand built amp with its combination of style and performance.