If you are looking to add a wood router to add to your collection of tools, getting a combo router table is a great idea. When you get the router and table combo, you can more easily perform most tasks that can normally are more difficult to do with a router hand.
We know how easy it is to rip a board using a table saw, instead of trying to use a hand-held tool to do it. The same applies to the use of a router. Many operations are much easier to do with a table that has the router attached to it.
Installed in a table, the router works as a shaping tool. Even long thin pieces of wood can be managed bu using the fence as a brace. Split fence router tables allow functions that can normally only be done by hand.
There are many other operations that can be made much easier and safer if the routers are used in a table. An example is when you want to add an edge to your work. It is easier to use a table to make your starting point and accurately hold the cut till you reach your end point. It is easy to see how many operations work better than just having your hand control the router.
If your budget and available space permit it, it is usually best to go with the full-sized table. This way you have the room for large projects as well. An available alternative is to install a router table combo where the smaller table size is normal.