In deference to Bob3J, no table is perfect and the OakPark is no exception. That's why I've defined 5 different tables for different purposes. The OakPark "system" is simple, elegant and very well conceived. At no point are you trapped into spending bundle of bucks for the next widget to be able to do "X". With the OakPark "system" you can make the elements yourself or purchase them if you're short on time. At no point are you trapped or restricted.
This is where the philosophy of using a router comes in. You use the OakPark "system" or the "Kreg system" etc. The OakPark "system" is a fraction of the price and offers all the versatility of all of the others.
The OakPark "system" uses two baseplates, an 11"x11" square for table mounting and a 7"x7" square for freehand use. Further, the OakPark "system" uses 1 1/2" template guides. Doing template work and the bigger the guides, the better the visibility. LeeValley stocks the most popular range of sizes and OakPark stocks the rest. Only Makita, in their metric sizes, makes a larger guide and it is 40mm.
The bit sizes for the OakPark "system" are limited only by the capacity of the router. They come stock with the 1 1/2" hole for template guides. However, there is another 11"x11" baseplate with a whopping >3" dia hole for large bits. I took a "scrap" baseplate and cut my own hole at 3 3/4"(Ca. ?) for large bits.
By the way, swapping out a baseplate (for my Hitachi M12V) is 4 screws and I'm switching baseplates all the time. I consider baseplates the jigs for the hand-held method of using a router. I'll take the baseplates off to use skis.
Milescraft offers a baseplate with a series of inserts to reduce the size of the hole but I'm cautious when it comes to additional mechanical attachments that aren't necessary. If you're doing geometric patterns, the Milescraft system is a charm but a potential problem in other environs. I wouldn't use it to make a post or a beam.
"So the bottom line is make you own to fit your needs..and will work with all the bits on the market place today.."
The more you work in this craft, the more you will gravitate to this point. There will always be situations where other methods fall short.