Recently posted this on another thread, with some minor edits:
I paid for RWGPS in 2016 when I started cycling, to dual record the DeathRide. The offline maps are a premium feature, and a great feature. Back then another feature for Garmin 520 users was downloading a route with the RWGPS turn-by-turn data. But my 530 doesn’t need it. The largest clubs I’m with has a premium account, and I still use RWGPS to modify a route and then export it. The free RWGPS account works well enough.
Nowadays I prefer Strava maps and routing.
One example - I did a gravel event on the CA Central Coast and the Strava route correctly displayed the 2 gravel sections, while the RWGPS route only displayed 1 gravel section (6 miles) and it missed the other 8 mile section of gravel road. They both claim to use OSM but Strava must be supplementing the data.
Strava:
RWGPS:
The Strava route has the lunch stop and is .6 miles longer. Sadly the Eroica team published two routes and I loaded the wrong one and missed the lunch stop on the ride 
I have other examples.