DianSheng have been famous in the past few years for releasing a range of large magnetic cubes and minxes. They produced bad budget cubes for many years but have recently begun to produce good speedcubes. DianSheng have released a range of normal cubes as well which have pretty much all been decent but nothing special, there are so many different 3x3 options out there right now that a cube has to be very good in order for most people to be interested.
DianSheng have released a magnetic gigaminx and teraminx which are obviously better than any other large minxes on the market, however, the megaminx market is far more competitive so it will be interesting to see how this megaminx compares with other popular options such as the Gan and DaYan Pro M. DianSheng's megaminx appears to have a ball core which makes it the cheapest ball core megaminx, it also features a slightly concave design.