Bet you feel like they're ganging up on you LOL, here's my perspective on the DC or Chinese knock offs, I too resisted the pumps, primarily because I was also told that they were not reliable. And the person who told me this is a Reef store owner. Not mentioning names here, cause he's a friend, So here's the scoop.
As a store owner he too ordered a bunch of the Jeboa pumps because everyone was asking for them, He gets them in and there were some issues with a few of them, No store owner wants to deal with customer complaints so he stopped selling them and they left a bad taste in his mouth, He believes in quality, German made or American made, he is also a distributor of Vertex and Ecotech so like Torex said whats he gonna promote and whos he gonna discount.
So as many of you know I too was against them because they were cheap and bound to fail but I bought a Jeboa WP25 and I love it, It performs well and doesn't hurt the wallet like a Tunze or MP40. In fact when I was looking for a return pump to replace my Loud Mag 3 My friend the store owner had some DC Pumps, open box that way theres no warrantee, I picked up one. 60 bucks For a Jebao 3000, multi speed, Feed Mode, quiet powerful pump. No warrantee but oh well, I guess that's his way of saying I don't care for them but it's what the customer wants.
I love my MP40 ES, but if it goes I'll get another WP25, I love the DC pump and I'm still a big fan of my buddy and his shop. I can respect his decisions but I'll admit it's a good product for a great price.