I was intrigued by the premise of this show, but quickly became turned off by how contrived it is.
I'm willing to suspend disbelief and accept that everyone in the group (or nearly everyone, since the marine biologist is pretty much useless) is highly skilled and trained in a field that is tailor-made for the situation. I guess in the post apocalypse no run-of-the-mill folks manage to survive and come together.
That being said, the ideas that the Colonists come up with each week strain credibility pretty far. I could buy it if every once in a while someone had an unusual solution to a problem, but when week-in, week-out they come up with elaborate solutions, I call foul. It all seems very contrived and likely fed to the Colonists by producers.
The second major problem is the appearance of needed materials. The Colonists apparently picked the greatest abandoned warehouse in the world to inhabitant. The warehouse miraculously produces whatever is needed to finish a project. Again just a little too contrived for me. The Colonists were never faced with abandoning a plan or doing something more simply because whatever they needed was magically found in the warehouse.
I'm guilty of watching the entire series. Once I watched a couple episodes, I felt I needed to finish it out. But, the last several episodes, my eyes were rolling quite a bit.