Extron really only seems worth it if you build your own cables as bnc cables are expensive compared to SCART. If you look at RCA web store it's usually $20-$25 for a SCART cable, add $17 to that if you want it fully shielded. The BNC cables however are $53-$55 but at least they are fully shielded.
Posted above is probably what it will look like should you not cable manage.
Something that takes up a lot of room, looks bad if not cable managed, not easy to transfer over to another setup should the extron die or you want to go to using SCART switchers. You really need to make your own cables or else there isn't a point over a traditional switch imo (unless you need like 16 inputs 16 outputs for some arcane setup of monitors).
It is cool being able to display multiple devices simultaneously as well but you can do that with other devices to a less degree.