I have owned this saw (R4512) since June of 2011. It is an EXCELLENT table saw.
Overall, the fit and finish of this saw is great. The installation instructions told you everything you needed to know for a successful set-up. The parts were packaged in small "slots" that were each labeled for which portion of the installation where they were to be used.
Once assembled (a 2 person job due to weight) and fired up I did the nickel test on the cast iron and metal wings. The coin stood on its end and never moved.
The cut quality is very good. I did replace the "stock" blade with a 50 tooth Diablo combination blade. Many recommend changing blades for ripping vs. cross cutting, but I don't find that to be necessary when using this combo blade.
As the standard saw you can rip approx 15" to the left of the blade and 30" to the right. An extension table is not required to the right, but is beneficial.
The fence locked down very well and stays true to the dimension set via the tape measure. It is the type which "locks" both on the front and rear of the saw.
Dust collection is quite good due to the hood that is attached to the bottom of the saw assembly. I had to rig up a 4" to 2.5" reducer since I currently have it attached to my Ridgid shop vac.
The one issue I had with this saw was the fact that the front rail is 2 pieces. It was VERY difficult to put the pieces together and have a smooth surface for the fence to slide over. Every time the fence gets to that area it BUMPS.
I did some research and decided to replace the "stock fence" with an after market fence & rail system. I chose the Vega Pro 40 which offers 40" of ripping capacity to the right of the blade. I did, at this time, add an extension table to the right.
I should also mention that this saw is eligible for the Lifetime Service Warranty program from Ridgid. Be sure to read the details on how to register your product. FYI -- The UPC from the box will be required.
Bottom line ......... Would I recommend this saw? POSITIVELY