I have owned a Fafner since 2009. It still works great and generally all EBS amps are really reliable and share a similar-ish preamp, drive and compressor design.
The Fafner is an older style design compared to the HD350 and TD650, which I have always found to sound a bit more refined, but the differences are really subtle. The current 802 is essentially a Rolls Royce of an amp which I would love to try but haven't.
The main design flaws of the Fafner are:
- the cosmetic bulb which glows red is prone to blow, however this does not affect the operation of the amp. It is worth replacing it with an LED bulb which will last longer;
- the fan is on the side, so despite being a 3U unit you need a 4U rack case to allow for ventilation; and
- it is 620 watts at 2 ohms, so using at 8 ohms it is a little bit unpowered compared to its size, but still useable in a gig (I use it with a single 8 ohm 15 inch cab for rock gigs and rehearsals without a problem).
My favourite features:
- awesome compressor;
- loads of headroom on the preamp;
- really great drive control;
- really flexible preamp;
- the 'Bright' control offers fantastic control of high frequency articulation; and
- the master control has a really useable and practical volume taper, so it does just go from silent to really loud (like my Mesa Big Block).
If it is a used amp, try replacing the preamp tube (it is really easy to do so), as it might improve the sound of the drive control.
Funnily enough, my back up amp for the Fafner used to be a Trace Elliot 300 SMX!