I have the Alpine upgrade on my 2014. I knew that I would be tweaking it after the fact. Sound is a very objective thing, as everyone's idea of quality is different.
That said, I wanted to keep the factory HU as well as sub enclosure so I elected to get it.
I changed out the Amp, speakers, and the sub to the tune of $2000.00 and now it will make my ears bleed at 70mph with the top off!!!
FYI, the 2015 Alpine is rumored to sound significantly better than the 2014 with all the changes they made.
You might want to sneak down to the dealer and have a listen...