As close to just-works as I've seen
I've been playing with consumer 3-D printers for a good little while now, waiting for them to get to the point where they would be reliable enough that I could spend more time printing than tweaking. The R1+ is an excellent worker that is usually extremely stable when it comes to prints. I've only had a couple problems with it: namely a clogged nozzle and the hot end thermometer getting broken. Their customer service helped me fix the clog, and sent along a replacement for the broken part. Other than that, this printer has taken pretty much whatever I throw at it, and cranks it out really well. The "medium" quality prints beat some "high" prints I've seen on other printers.
They recently came out with a couple of new printers, which look great and improve on the R1+, but if you can't swing one of them, these are actually quite cheap now, and an excellent value.
Some suggestions for getting the most out of yours:
* A quick spritz of Aqua-Net hairspray on the print bed does wonders for adhesion
* Print and use a filament oiler early on, to help avoid clogs.
* Get a "Smart LCD Controller XXL", it's a *huge* LCD screen that lets you control the printer without tethering it to a computer. It looks great, and really enhances the usefulness of the machine. It's only $70 or so, and can be installed in an afternoon. Can't recommend it enough.
Anyhow, this is an excellent printer, combining a good large print bed, bed level correction, and very high reliability. I've been very pleased with its performance. The bundled MatterControl software is not exactly mind-blowing, but it's adequate. I may move to Cura since I'm used to that on other printers. Definitely worth looking in to as a ready-to-use consumer printer.