My son was a tour guide and became skilled at deflecting personal questions such as what was his high school GPA, SAT score.
I think the tour guide matters sooooo much. At admitted students day at CMU, SCS, son was with a tour guide from the business school. Other meeting went as wrong as can be.
Then, next school, where he was late for the special days, we had a private tour with a gal in his major. He was invit d to come a second day to sit in more classes. The head of admissions met with him an hour. Guess which school he accepted?
I’ve never been to a school where a CS major is giving tours - true to stereotypes sadly!
I prefer tours where most of the talking is standing still though I’m okay with some backwards walking. I don’t think my younger son didn’t reject any schools based on the tour guide, though I’m pretty sure what really killed Brandeis was the office park architecture. We did once have a just one year past graduation student do the info session - and have us completely turned off a school that had a good tour guide. It was also way too small.
Twice we had drama majors give tours, even though they were very different from either of my kids, they were enthusiastic and could project well.
I like tours where we stop somewhere dry if it’s raining or shady if it’s hot. I like to go in buildings and dorms, but do understand why some schools decide it’s too much of a disturbance to the students.
My younger son visited most schools twice and did overnights during accepted student events, so I think he got multiple points of view.
A lot of times the guides just have to take you to see their own room (or that of a friend)–so keeping any negative comments to yourself is nice–just look at the layout of the room and ignore the unmade bed…at least you got to see one which doesn’t always happen.
Unmade beds are likely the usual state of most dorm rooms, at least based on my own kids’ patterns. 
Not CS…but my engineering major kid gave tours a lot…and was in charge of an accepted student program.
She was also asked to give tours specific to the college of engineering.
But then,she decided her sophomore year she never wanted to be a practicing engineer!
The only place we had tours by engineers was at Carnegie Mellon where we got a tour of the Robotics facilities and another one of the Comp Sci school - both were part of the accepted students day functions - I don’t know if they were regular tour guides otherwise.
I just want a tour to show me what I can’t see for myself, walking around. So I want to go IN to buildings and I want some explanation of what goes on in that building. I do want to see a dorm. I want to see a typical classroom/lecture hall. The library - maybe not all the floors. The dining hall, student center, career center.
I’ve already attended, or am about to attend, the info session, so I don’t need that info repeated.
So useful to see the different experiences. Thanks
A long time ago, the tour my daughter and I had at Yale was given by a Pakistani engineering student. In excellent, though heavily accented and recognizably South Asian, English. Hardly anyone on the tour expressed any interest in engineering, although he talked it up a lot.
It was actually a very moving experience for me. Despite the vast ethnic/cultural/age/professional differences between our guide and me or my wife, and the nearly 30 year difference between his experience and ours, he spoke about Yale in exactly the kinds of terms we did, and appreciated exactly the same things. At one point, my daughter asked me, “Did you give him your script, or what?”
We visited a dorm room that was clearly NOT the guide’s because both beds had sleeping girls in them. The guide assured us “They don’t mind!” as about a dozen of us filtered awkwardly in the space, only to discover these now-not-sleeping-but-wishing-to-be girls as the guide chatted about dorm life. I can say, though, that the sheer strangeness of the moment caused the several families in the group to bond rather strongly for the rest of the tour. We could only imagine what might come next!
At University of Maryland College Park we walked forever and ever and only went quickly through one building, a student athletic facility, which was very nice. It did feel a bit like we had already seen the tour on the walk in from the parking garage. Later in the day we had an engineering tour where we saw lots of different labs. I think doing the department meeting/tour is worth it if your student knows their major.
They needed to make room for the keg. 
I agree with everyone’s points but I was struck by how uniform the tours were.
It is as if all the admissions department attended the same marketing conference. I was waiting for someone to come up to me at the cafeteria and ask: “and how are the first few bites tasting?” Every college from the local barber college to Ivy leagues is proud of: diversity; student research; easy access to professors who love to teach; small class sizes; great food accommodating vegans to meat eaters; great location with access to unlimited opportunities; uncountable study abroad options; inclusive vibe and collaborative students (competition is bad); all the Starbucks you care to drink; and of course the leftist politics.
And with all of the money they rake in on applications, how about a T-shirt for the applicant?