Different from many other Chinese knife companies, they didn't start from making clones, but produced their own original (and pretty special) designs from the start, and they keep doing it till now.
They specialize on CNC'd titanium for their premium models, aluminium for the mid-range and G10 for their budget line. Their designs seem to have that really clean, classic look that many of the knife fans like, and it's apparent the designers really know what they are doing.
The names of many of their models usually have a marine theme (Deep Sea Monster, Deep Sea Giant).
Recently, 2 more subsidiaries of the Stedemon have emerged. First is Maxace, which are quite similar to the Stedemon in the overall feel and materials used, but are believed to be designed by different designers and made in another factory (with the same, if not better quality levels). Another, newer one is ZKC (Zone Knife Company) Knives, which, as they claim on the pocket clip, are designed by Stedemon and are made in the same factory, but under different brand.
Stedemon Knives have recently moved to the American market and their knives have almost completely disappeared from AliExpress and DHGate, but can be still found in the excellent Vespa store (former ChinaHighEndEDC).
Check Stedemon + ZKC knives here: https://goo.gl/mEiNos
Maxace can be found here: https://goo.gl/mqYTWD
Maxace Wind on AliExpress: https://goo.gl/8f6H7P