I haven't had the pleasure with RCBS, but I was amazed to find Lee takes customer support pretty seriously as well. I chose the Lee Classic Turret because as a beginner I liked the simplicity of the turret style press as opposed to a progressive, the Lee dies are quite nice, caliber changes are a snap, it will do small rifle well enough and it's cheap. I didn't figure you'd get much that didn't come in the box.
My box didn't have the advertised spare plastic bushing that the index rod drives against, so I figured I better get some before the one in the press bowed to the failure-prone nature of the design. Lee sees it as a consumable, so I guess it is a matter of perspective. I went to their webstore and put 4 bushings, an index rod and clamp and a primer feeder trough, mounting arm and washer in the cart fully expecting to pay the indicated prices. The actual prices were 0.00 for everything, marked 'service part' on each line. I did not have to provide proof of purchase for the press; I don't think I even had to pay shipping.
The one thing everyone agrees on regarding Lee products is that they're cheap; I was amazed this level of support automated and available 24/7/365 to all who care to take advantage. I've since bought a sweet RCBS collet bullet puller and primer tray, plus a Chargemaster 2000 scale that's just OK. It's great to hear they stand behind their products should I decide the constant drifting of the Chargemaster is cause for action.