The ride itself only takes about a half hour once you get on your cart. It barely feels like you're moving at all. If you're going for the first time I would recommend going at night. The city lights are amazing. The daylight hours are a whole other sight. You can see for miles all the surrounding mountains. I'm glad I've had the opportunity to experience both.
Local pricing is very reasonable. $12.50 day & I think $18/$19 night as of 3/225/18. For non locals there are also many discounts. Buy your tickets online to get special pricing.