pfSense is really a good choice, I'm successfully using it for two years without any major problems on a dual-wan setup and some 50 clients. How much coverage

pfSense is really a good choice, I'm successfully using it for two years without any major problems on a dual-wan setup and some 50 clients. How much coverage and clients does a single Eero manage - by the reviews I read, I think it shines only when multiple ones are used, but that makes them a pricey solution.