There are two departures per day, 10:00 and 14:00. They will pick you up in a mini van from your hotel about 30 mins earlier and take you to their main bus station where you will board the large bus. On arrival at the North Pattaya bus station you will again transfer to a mini bus to be dropped at your hotel.
Just make sure you select your pickup and drop-off hotels when making the booking.
If the timing suits it's a good service.