I built a Paulk top with a rockler router insert and systainer storage for my son. Router is at one end and the other is a table saw outfeed. We inset T-track for fence adjustment and included a miter gauge slot. Wired an interior receptacle into a switch set into the side of the bench for easy router power control. It works really well.
Positives - smaller footprint, larger work surface is handy on some routing tasks, dust is somewhat contained in the Paulk 'cavity' below the top as we did put a divider to deal with that.
Downsides - You CAN lose bench space when you are doing assembly / routing for things like cabinet doors or drawers. You just need to plan better so that if you drop the router below the top and remove the fence you are ready for assembly. I have a separate bench, MFT table and CMS table which I like because I frequently will be cutting / routing and assembling or tweaking fit and finish so being able to move between the router and bench / assembly is an advantage.
The base we built is 35 x 67 with four Systainer storage bays under it and a center cavity for larger items. The Paulk style top is 36 x 76. Make sure you get double locking casters for stability. The bench we built is pretty heavy but would move if we didn't use the casters that lock from rolling and rotating.
I don't have a photo or drawing of the bench but attached is the base -
