I first purchased the Balance 20 and then upgraded to the Balance 200. I need two routers, one for an apartment and one for a large multi-building residence (think small farm). I plan on using the Balance 20 for the apartment. The Balance 200 is now supporting nine APs and about 80 connected devices at the bigger location.
Doing it this way I could test the Peplink software before springing for the more expensive Balance 200.