I love love love this place! You can ask for additional fruits/veggies and have your drink adjusted to your liking. I've been here so many times that they already know how I like my drinks made and Cimaron remembers my name because I'm always there.
I read in some of the reviews that some of the staff can be sort of "eh", which I agree. I've had some great customer service experiences when the manager is there. He's very friendly and knowledgeable about the product and makes great recommendations. However, a good amount of the staff are...kids. I've walked in on several occasions and they're just chit chatting behind the counter without a care as to what the customer is looking for. I guess it all just depends on who you get.
Overall, I'd recommend trying "The Sublime" or "The Buzz". Those juices are so bomb!