There's certainly value to be had in a lot of the chinese manufactured products. Compared to buying British its always going to be more of a risk regarding warranties/support/general quality issues. Until there are more home-grown reviews/buyers its hard to say if a product is well supported or likely to suffer quality issues.
I would think its unlikely you would be able to get that much actual customer support in regards to helpful customer stuff, questions etc. However the larger companies (Topping etc) do have support to a point. Better support I have found, is usually from the vendor of the product be that Ali Express/Ebay etc. I have recently had a faulty "Breeze Audio" amp go bad and they are replacing it for me free of charge, even though its a few months old. This is via the messaging center on Ali Express.
I have found the vendors helpful whenever I have had an issue.
I too am interested in the Topping D70. Very useful features for me like AES/EBU in and balanced output as well as a superb DAC.
System 1: - Amp - Musical Paradise MP-701 mk2 - Neurochrome 686
- Source: Audio Technica LP-5 - Custom 6V6 stage - Novafidelity X30 - Soekris 1421 (LPSU) - Custom TDA1541 C3G DAC -
- Speakers: Martin Logan Prodigy's - Subs: - REL T3's -
System 2 - Amp: Musical Paradise MP 303/Custom 300B SET - Custom 6SL7 Pre -
- Source: Pioneer N-30K - SONCOZ SGD1 -
- Speakers: Loth X BS1's - Sub: REL T3 -