my 04.5 had the access roll up cover. worked great, after 10 years the vinyl was starting to look worn, but still serviceable. kept stuff dry, away from prying eyes etc. New 015 has a undercover flex cover. more secure, looks nicer, easily folds in 3 places if needed, easy to remove if needed.
For what we want, being able to store things out of site, and out of the weather when traveling, some security (tailgate locks and that locks the cover) bed protection, it works well. and is easy to remove when we get bark dust, gravel etc.