TT Warhammer 40K is a mediochre game at best. Unfortunately I love the 40K universe, and the 40K line of minis. Frankly the story and the minis kept me playing TT WH40K long after I became jaded with the system. However GW has recently alineated me even further with their overly greedy pricing hikes. Frankly I cant affort to pay almost $50 for 5 PLASTIC models. Granted Space Marine terminators are one of the worst case scenarios, but still, even $35 is more than I want to pay for 10 marines (or 8 chaos).
So, it is easy to enjoy the 40K universe, but if you don't want to spend, literally, thousands of dollars on it DoW is a good way to do that.
Also, DoW has an active modding community, ranging from very complex mods that add whole new races to the game to simple do it yourself skinning and adding shoulderpad iconography and banners. The modding forum is
here.