I actually have a few of them! Voyager, the Delta Flyer, the Val Jean, and a Borg cube. The NX-01 and Defiant are in the mail. While I love the novelty of having and building my own fleet, the quality of the bricks I feel could be better.
Don't get me wrong, it isn't bad, just not nearly as good as Lego. I've had to in several situations glue down pieces since they won't stay in place. One angled board I received had a chunk of it melted away. That type of thing.
You will have to press harder than you think you should to get larger bricks to stick together as well. Again, not a large problem, but it can be annoying (you might make your fingers sore as a result, I've had to take breaks because my fingers just needed to recover).
Last thing, you will absolutely get sick of the color gray. So. Much. Gray. But, I still think they're worth it, the novelty of the sets makes them cool to build and they still are fun, they just have a few shortcomings as it isn't as quality as Lego.
I agree with all of this. The Borg Cube especially was very difficult to assemble, and I've done some pretty big official Lego sets so I'm used to a good challenge. I had to resort to gluing some parts in place, as some of the plates were bent and just would not stay in place while I worked on the next side.
I also really came to dislike the tiny black pieces they use to add studs to the bottom of some bricks. Too small, too hard to insert, and way too easy to just roll away and never be found.
That said, the final product looks fine and nobody ever questions if they are legitimate sets or not. I don't regret the purchases, just didn't enjoy the build process like I normally do.
Yeah, I'm in the middle of the cube now. Several of the 1x1 type pieces are not committed to staying where I've placed them. So far the hardest one was the Delta Flyer purely because of the angled panels by the windows, you have to hold it very particularly or the whole thing just comes apart since those sections are held on extremely minimally
I did not, I really didn't think it was worth the hassle. The plate was sandwiched between other bricks and was going to be facing the wall once I finished so I just left it be