I have one - they are really good practice amps - tend to get a bit farty at high volumes, but its a blackface Champ in a tiny vintage box - so has the mojo to boot.
Changing the valves improves the tone - the cryo Brimar 6V6 from Watford Valves really improve the efficiency of the amp.
I also put a Jensen MOD 6" speaker in mine - £20 including postage from Tubedepot.com - this improves the combo's handling at driven end.
Compared to the Epi - its a fender all the way through - not the dark driven sound, rather the bluesy champ sound of yesterday.
Apparently there is a mod to disable the fixed blackface tonestack - which turns it into a Tweed champ - might try that.