I saw a huge difference in service too when traveling. In the U.S., I switched to booking with miamilimocar.com for airport rides and private events because it was way smoother than the usual options. Drivers are on time, and the cars are clean without that weird attitude. Not saying it's perfect, but at least I don’t have to deal with flaky service every time.
If their domestic market is big enough they don't need so long to reach product maturity. But luxury cars is a tricky market -- a lot of loyalty sales. Not many Benz or Beemer fanboys will switch