Of course it is very interesting to visit but there are too many people visiting at the same time. It is almost impossible to see the exhibitions due to the number of people. Thankfully we booked late and our tickets were for 2.30 pm which meant that we could wait until there were less people around and enjoyed the visit. There's very little value in hiring a guide in my opinion and even less on renting the audio. The guides can't help you get closer the audio recording was patchy. We took a taxi from Xian to the site 108 Y and a local bus on the way back 8Y. We didn't see a place to have a cup of tea. All in all it's worthy but challenging due to the crowds.