I mostly use my Radrover to commute to work also (about 13 miles round-trip). The fat tires make for a very comfortable ride and it can handle transitions to different surfaces like uneven concrete sidewalk surfaces, cracked asphalt, and dirt lots with ease (still have to avoid potholes). You will find out there is a lot of debris in the bike lanes when you have to share the road with cars (broken car parts, tons of glass, sharp rocks, trash, etc...).
One thing that surprised me was how easy it is to get a flat tire if you have a lot of goat heads in your area. There really isn't a lot of rubber to stop the average size goat head from puncturing the inner tube. The thin rubber on the tires are probably to keep the weight down. I ended up using Mr Tuffy tire liners and 2 2-oz bottles of Stans tire sealant per tire. Usually every weekend, I'm picking out 10-20 goat head thorns broken off in the tread and some of them punch through Mr. Tuffy also. I just rotate the tire until the sealant squirts out, wait a few seconds until it stops, and double check the PSI for a few days afterwards. I imagine my inter tube looks like swiss cheese after +4 months of doing this every weekend.