Feature:
It has XLR inputs, which is fairly typical of modern pro power amps. It has SpeakOn, 1/4", and banana output connections, which is very handy. The important things are the built in protection diagnostic functions. It protects it self from over-current, DC output, and over-temperature. It also has a built-in circuit breaker. Very cool, and what you expect and get from Crown. PLUS, it has a 3-year manufacturer's warranty. Crown has a lot of faith in their own products.

Quality:
This unit seems to be very high quality. Crown is, in my opinion, makes the highest quality amps you can buy. This unit is made in China, which caused me some concern at the time I bought it, but after 3 years of use almost every day with no problems, I'm very satisfied that the Crown quality is still there. This amp has a 3-year manufacturer's warranty. Crown must think it's a quality product too.

Value:
This ampis rated at 800 watts/channel into 4 ohms (two 8ohm speakers daisy chained per channel) and 1600 watts bridged to mono. That much power from a very high quality amp for less than $500 is a great value.

Desirability:
Power amps don't have sex appeal, but I do like the Crown logo, so I gave it a 10. But, that's just me.

Sound:
I've used this amp in my home practice studio to power the monitor system for about 3 years. It powers two monitor speakers on one channel and two "house" speakers on the other channel. It sounds great.

Ease of Use:
Plug it in, turn it on, and set the levels on the detented level controls on the front. I run mine in the third click above zero. It's plenty loud but not too loud.

Support:
I have had not problems with this amp, but I've called Crown to ask questions of their audio engineers, and gotten them, for free. Not many companies will do that these days, so I consider that great support.

Overall:
I expect to use this amp until I'm too old to scoot down to the basement. I have a friend who has a Crown DC 150 power amp he purchased new in 1972. He's hand no problems at all with it. I looked at other amps, but based on my friend's experience with Crown, that's what I bought.