I use mine as a daily driver, 100+ mile round trip - really helps using the commute lane. ~75K miles on two roadsters - never had any major problems
but a few minor things -
1. #783 had an electronic component fail in the PEM after the warranty expired - ~$500 for diagnosis/repair
2. kept having to replace rear tires on #783 every 6-8K miles but that's because I was having too much fun in the beginning
3. leaks in trunks of #783 and #970 when it'd rain a lot - fixed under warranty
4. 12V battery in #783 kept dying but probably because my huge subwoofer (aftermarket) was turned up too much

5. Blower gets clogged with leaves, etc. so you might need more than an annual cleaning
6. Head unit connector on #970 got loose and needed a new wiring harness
#783 got ~51K miles before road debris wrecked the battery (had 500 when I bought it) and battery went from 187 ideal to 170 in standard charge
#970 has ~53K miles and currently also gets about 170 in standard charge