FWIW - I'd recommend "upkeep" shaving on the legs pretty frequently. It takes a lot less time to keep it up than it does to let it grow out a bit and then cut the nubs back.

Also - my SO does not like my face/legs/anything when the hairs are just starting to grow back. For me, this means I shave about every day. YMMV

I've had that electric razor for 8 months now- I'm a fan.