I have seen the Rockler drill press guide, and it looks like a useful tool. That drill press guide sells for $189 at Rockler, before you start buying expensive accessories for it. That is asking a lot of money for what you get. I am not even remotely interested at that price. I will get by with the several different basic drill guides that I collected over the years (mostly for doweling), or making my own as needed from a scrap piece of 2x4.
For the record, I replaced (upgraded) my old drill press a couple years ago. I bought a used, but newer, larger, more horsepower, and overall better drill press - for $80.
Rockler has a convenient store near my home, so I shop at Rockler. What bothers me about Rockler proprietary products are price and sometimes build quality. I especially dislike how Rockler uses delicate, moisture-sensitive MDF in their sleds and jigs instead of plywood or some other high quality and more durable material, yet charges a high price for those gadgets, too.