Yes, there are good ones and not so good. I have owned maybe five Huglu made SXSs. Had trouble with only one; a Dehaan SO 20 DT (same as a Bobwhite only bead blast receiver); right sear won't cock.
Single trigger reliability? I may have lucked out, but I have a Huglu S1 single trigger (Same gun as a Ringneck but has a different dress on). It is a 2001 and a silky smooth safety/selector with no problems at all.
Also have a Huglu S2 20 ga(same basic gun as a Ringneck) made in 2002; again, silky smooth trouble free safety/selector. Man is that a sweet gun!