I needed a ride to SFO, and a friend had recommended Pleasant Limo. The service was first-rate, the price was competitive with a taxi -- and they picked me up in a Tesla Model S, no less. (Tesla is not guaranteed when you order a sedan, but they do sometimes use them for those orders, the driver told me.) Pleasantly surprised? Absolutely. Highly recommended? No doubt.
Was out in Los Angeles for a meeting and used the service from LAX to Beverly hills. Always on point and on time.