So I have Tesla fever and Roadster fever...I currently own a 2005 Mercedes SL500...looking into obviously a used Roadster and I'm just not sure if the car is even right for me...I was hoping owners here could help me decide. I have a daily commute (highway) of 80-100 miles roundtrip here in Southern California and wanted to use the roadster as my daily driver. I'm hoping to have it for at least 5 years plus...is this feasible? Is it true that the battery is only good for 100,000 miles or 10 years? If so, how much is it to replace? How reliable would the roadster be as a daily driver? How expensive is upkeep? I'm assuming not as much as my Mercedes...thanks everybody for all your help and I hope to soon be a Roadster owner...and anyone selling theirs please contact me!!!