I have only ordered from them once, but on that order I purchased this set, the only large one at 2,888 pieces and a bunch of the 500-600 piece sets: the defiant, NX-01, Voyager, and Enterprise E (I am probably the only person who likes that design). Didn't have any issues at all and shipping was quick and easy. One thing to note is their prices include VAT taxes, if you are not in the EU, the price will be a little cheaper that what is shown. I ended up buying last October when the exchange rate was almost even, so for everything (5 items) it was 315 shipped to my door in the US.

As for the builds, the DS9 is fragile as you would imagine. The stand they do have you build is awesome and holds this massive things and lets you easily move it around. This is more of a display set, not a play item. This set doesn't have, nor do the little ones, any interiors or extra little details. That is the one things Lego is pretty good about is giving you something. For example, the NX-01 doesn't have the neat pulse cannons on the bottom. Little nit pick, but a difference between the two. All major details are there though, no mini figs. None of the sets were missing any parts and much like Lego I had a ton left over. The bricks are printed, which is nice. I have done a bunch of Lepin and King sets, quality is on par with that. It is good, but lego is just a bit better, but I doubt a normal person could tell the difference. There is no gluing, just different building techniques. The little ships are VERY sturdy, you can you pick them up and fly them around (I, as a 40ish person, totally haven't done this on multiple occasions). Each model looks like the ship it is supposed to annnnd these are officially licensed.

I am very happy with my first purchase. I plan on buying the new larger NX-01 (which has pulse cannons) when it comes out and a couple others. At this point, I will buy anything that is not star wars and a brick. Let me know if I missed anything.

Here is a pic of two of the other ships: https://imgur.com/a/MulzLWr