Sound — 10
Extremely versatile and tweakable for anything from West Coast USA sound to spongy hard Brit! You really need to play with the EQ and switches to truly appreciate the wide array of tones you can get out of this....the youtube stuff online doesn't do it complete justice. For anyone looking for hardcore Marshall or Mesa overdrive out of just their amp, this won't be the one... although it can really kick it and get a great hard saturated tone. For the styles of music I play, I don't need the heavy thrash tone, although a pedal in front would give you that if needed.
Overall Impression — 9
I'd recommend this amp to anyone looking for a feature packed and versatile amp that can produce an extremely varied tone from US Fender Clean to narly hard british, and everything in between. The price comparison to what you'd have to pay to get these features all in one with the competition is definitely in Traynors favor. You're not paying extra for the "name" that you'd pay on the big brands and boutique amps...but you're getting the most important thing - killer tone and great features!
Reliability & Durability — 9
Only had it a month, but based on its construction (no MDG), and weight/feel, and a look inside, I can tell this isn't an amp put together with toothpics and gum. Solid construction that I'd put against anyone in the business. Only concern is that it is quite heavy, contrary to what they say on the website.
Features — 9
This amp comes standard with features that similar amps in its class don't have (i.e. Fender and Marshall). Note - I do also own Fender and Marshall amps, and love the sound I get from them as well. However, this YCS90 has features like the ability to operate in 90W Class AB mode OR 25W Class A, Brit/USA switch, expander switch, modern switch, scoop switch, boost on overdrive channel, fully independant EQ section for each channel, accutronics reverb, etc etc etc....all for much much cheaper then competing amps. Also has 90W power and Twin speakers. Only thing I'd like to see to make it a 10 is a footpedal with more ability to switch between modes (brit/usa, modern, scoop), and maybe ability to take EL34 tubes instead of 6L6.