As far as I could tell I would say the quality of their products seems very good especially if one considers the asking price. I own two of their pieces (JD-102b and 301) and I'm very impressed so far.(I only wish they had an tape out as standard equipment.But this can be added by either dealer or at Jolida, I believe.) Also, there isn't a headphone jack.(But lots of equipment do not offer this as well.) So having said all this, I would recommend you check out the 50/100w hybrid int. amps they carry.($500/650 retail). Really isn't any more maintenance other than replacing the pre-amp tubes and these last for quite a long time. Find a retailer who will let you addition in your own home to see if they suit your tastes and needs. At these prices you could afford to buy "new." Every piece of equipment interacts (synergy) diferrently...along with other factors,...room, placement, tastes etc,etc...That's why it's real important to audition in one's own home. The Jolida int. amps are very impressive in sound/value/and price IMO. Personally, I can't speak for the reliability of Jolida products (having only owned for a short time) but they seem well built and should hold up well. Just to confuse you some more, the Audiolab 8000S is being blown out (50% off retail) but you probably wouldn't be able to audition and the warranty/service/synergy? Lots of choices!
Good Luck. Bill
Good Luck. Bill