While I don't post on here much, I do have some experience with MDC. There were a few teething problems with the stitching on the canvas, a gas leak and a latch that stopped latching which were all attended to when MDC were made aware. Actually as I have worked for a caravan company years ago I did the canvas work myself with tools supplied by MDC. Not that they refused to repair it, I just trust my skills.
I looked at many Aussie made products. You know aussie steel and aussie canvas etc. At least one large company that tells you it is aussie steel is not quite right. They buy from an aussie company which is true. However some (a Large amount at times) of the steel is imported and retagged here in Australia. This due to production restrictions in Australian mills. I cannot tell you who, where or when as I like my job and want to keep it for a while.
At no time is the steel sub standard, it does meet all standards in Aus and NZ, as does much of the steel used in imported trailers.
I don't get into the Aussie versus import argument. Look at what you get. Is it value for money? Are you happy with the layout, accessories etc.?
I am happy with my MDC so far, It has seen a fair bit of corrugations and dirt, it has not fallen apart. Even still running the factory Taiwanese tyres without issue. September will be a test with a 6,000klm trip planned. I don't expect any problems.
Chris