SunSun304B (which is the OEM manufactuer for Marineland,Tetra and JBJ canister filters btw... they are identical)
I've had a few of those and believe or not at $80 for a 530gph filter with a inbuilt UV and as much media capacity as a Eheim Pro3 ... they are surprisingly good. They work well , have good flowrate, prime easily and have virtually no bypass. I throw out the cheap media and pipes and use Seachem Matrix and EfiMech and I can't complain. If one does break ...heck they are $80 which is less then the impeller on some Eheims !
Another one I've used a real monster is the Resun EF-2800U a huge 800gph canister that reminds me of a 2260 Eheim but with media baskets and without the price tag ...about $130 and its got a built in UV too. This one also goes well with massive flow.
Don't get me wrong I'm still a Eheim guy but for less critical tanks such as my feeder tanks and for tanks with less vauable stock these cheaper chinese brand do ok. They might not be the same quality as Eheim (but they are a better DESIGN then any Fluval or Rena and as for the SunSuns they are exactly the same as Marineland C series ...SunSun make them for Marineland) but for $80 heck ...buy 3 or 4 ...and if one did stop (I have had nothing but reliable service so far in about 18 months) well just put a new one on.