Jolida 1301 integrated

Any reliability issues from owners of this integrated? What modest modifications to include tube upgrade, hard wiring of better PC. Thanks.
I have one of these in the bedroom driving a pair of stand-mounted B&W speakers (next upgrade is a sub-woofer). It's not my primary system and I've had it for less than a year, but so far I've been quite satisfied. Right now it has a pair of GE 5751 black plates replacing the stock tubes--an easy upgrade. I also added Herbies tube dampers and that helped the sound as well. Piano and female vocals really glow. I wish it had a better power cord, but I can live with what it has built in.