We bought the basic Renogy RV "kit" that included that panel. To say we're please would be an understatement.
I disconnect the battery whenever we're not camping, but leave the solar on. My battery is up 100% ALL the time. When in use with the furnace on, etc., the panel recharges my battery by noon every day.
I used to always remove the battery over Winter. This year i left it in. What amazed me was the panel was still providing a charge to the battery even when it was covered in 2" of snow.