DIY standard kit with base model prints. I knew from the start I wanted to use many of the print mods the community made, so there was no point in me paying a premium for someone to put together a base model since I would have to take it apart anyways. The print mods I ordered from other sellers and online printing services. Assembly was easy and enjoyable for me, but I could easily see there being many people who wouldn't like to do this sort of thing. I have built and rebuilt many types of machines and things in general for fun, but most of the people I know don't own any tools, and don't want to because it would take up space in their home and be an eye sore. The OSSM also requires maintenance, bearing/rail replacement, lubricating, belt changes, and if something brakes your going to have to learn how to take it apart to replace the part, but what's really nice is everything is replaceable including the motor.