One of the biggest impediments to spending time playing games with my and kids is that it can take a very long time just to set up and put the game away. Instead of allocating 90 minutes to get a good game it can add a good 20-30 minutes to both set up and put away. Inserts can be a wonderful asset so that you can spend more of your time playing and less time with the tedium of the set up and take down of games.
I've bought inserts from a number of companies but Inserthere inserts are easily my favorite. The foam board designs make set up and take down a breeze. The game pieces stay where they are supposed. The inserts are light and so don't add to shelf wear on the boxes. And I don't have to make glue anything together myself.
Other premium inserts are heavy and require me to make them. Other light inserts still require me to make them and the selection is limited. Insert Here has by far the biggest selection of inserts that I've see and requires no assembly. I'm a big fan.