Thought I'd drop in on this and give my 2 cents.
The SD Press is my first 3D printer. I bought into the plug-and-play idea and low cost. I was pretty sure going into this that it wasn't going to be true plug-and-play due to all of the complexities and variables in 3D printing.
Over the past few days I've had a lot of failed prints and puzzling problems but I've finally completed a couple of prints and have learned a lot in the way.
Initially I had issues with the extruder getting stuck and easily solved that problem when I realized the wiring was blocking its path. Easy fix. I then had issues with the extruder running into the build plate. Again after watching what was happening I found that on some occasions the trigger for the bed height wasn't dropping. Since it only drops in a certain location, I found that as long as I home x and y then it is certain to drop when it starts.
With those problems solved it was on to printing. But the filament wasn't sticking to the plate. I had thought it had to do with temperatures but being new wasn't sure. I found out that the glass needed something to help it stick. Some Elmers glue worked perfectly.
Back to printing. Now I'm hearing knocking around the extruder and prints are poor. I watched the drive wheel and saw it slipping and the filament wasn't always advancing. Looking closer I saw a set screw so I thought I'd check how tight it was. It was loose. Tighten it up and now the filament is advancing nicely.
Printing again! 1 hour into a large but simple print I saw the extruder to high and no filament coming out. It's a jam. This one was a little difficult to troubleshoot but after a few failures and reading through the forum I found that opening the lid and removing the cover from the extruder should help. Done.
I finished a 4 hour print today with no problems and all the previous problems that I had were solved with a little patience and examination. No problems required me disassemble the printer or do major surgery on the printer.
While I'm a little disappointed that it took me several days to get a full print, it was worth it to understand the printer a little more. I still have a lot to learn about 3D printing in general but this has been a rewarding experience.
So, should you cancel your order because of the issues that you've read about here and because you don't have experience or a giant workshop? In my opinion, no. Take the problems you may or may not run into and turn them into learning experiences. If you are serious about 3D printing use this printer to learn as much as you can about how it works.
Sorry for the long post. I hope I've help put this in perspective for you or others.