I purchased the G0702R with the separate X-axis power feed new in late December of 2012 and took delivery in early 2013. I installed a glass-scaled DRO from DRO Pros shortly after I placed the machine into my basement. The machine itself is reasonably well-constructed for a hobby mill. As others have mentioned, the safety shield limits your ability to do any close-up milling. If you choose not to remove it, you will eventually crush the shield as you attempt to maneuver the head in for closer work. The LED work light is useless in my opinion. I did not find that it cast enough light to illuminate my work pieces, and it could not be maneuvered into casting light on the front of my work. I found a magnetic, goose-neck high-output LED light at Menard's that worked great.
The table on this machine is of good size. I installed a full-size Kurt D688 vise onto the table and it worked exceptionally well. I doubt I would go smaller and the machine gave no indication that it had any difficulty with a vise of this size. You can easily fit a 6" rotary table on to this mill, though not an 8". The T-nuts are of an off-size but readily available through Grizzly.
I did have trouble with the driver board in my machine. I'm not sure if I ended up with a bad solder joint or what, but the machine went completely dead during a relatively light milling operation. Fortunately this happened during the first year of ownership and Grizzly replaced both the motor and driver board under warranty. I had to swap the motor and driver board myself and had a chance to Google the components. I could not find a replacement driver board or motor anywhere online. The board itself would have been around $800 through Grizzly, and the motor was close to $500, had my machine not still been under warranty. I never had to replace anything after the first board went, but I didn't keep it or use it much after that because I wanted to upgrade to a full-size mill. I sold my G0702R last summer and bought a new Acer E-mill. The G0702R was an excellent mill to learn on and helped me to fix and make several things. For hobbyists and lighter-duty operations, you can't go wrong with this mill. There are several people in the DIY CNC community that are converting these machines to CNC as well so this machine could be an ideal choice, if your plans evolve in the direction of automation.