The tour starts out near the Nevski cathedral and returns to the same place. I chose Plovdiv because I was interested in the ancient ruins. The 2 hour bus ride in both directions is comfortable enough but there is very little to this tour. The tour guide gives us a walking tour of the old town and takes us to where the bus picks us up. We walked pass several historical houses and points of interest and we were given time to visit a very small church but this is not anything you cannot do on your own with a good google search. The cost for the bus ride (because that is all we really got) was 30€ 60LEV which I found to be pricey especially since you have to make your way from your hotel in both directions to the pickup point. It did not include even a bottle of water.
The tour guide was nice and very patient with people as a few strayed away from the group.
If you can find your way to Plovdiv on your own you can visit the old town and save yourself some money for a nice meal in the town...

We thoroughly enjoyed our day. Boyana Church is a unique experience. A shame, if understandable that time is limited to ten minutes for a visit. Despite this, our guide Daphi gave us an excellent, interesting commentary in flawless English, and was also happy to chat and give restaurant recommendations.
Rila was well worth the drive, a fascinating place. Daphi gave us a guided tour which lasted about an hour.
The minibus had aircon and wifi, and Daphi gave us information about Bulgaria, its history, culture etc as we drove.
Highly recommended.

A friend and I booked a 2 day guided hike, The Seven Rila Lakes & Malyovitsa Peak ridge walk, through Traventuria. It was a bit pricey per person for just two people, but it was absolutely worth the money. It was an outstanding experience. Our guide, Todor Nedkov, picked us up at the apartment we were staying at in Sofia at 7:00 AM on the dot. Todor was incredibly generous, kind, and knowledgeable. We unfortunately didn't have the best weather (very, very foggy in the mountains, with rain in the afternoon and a risk of thunderstorms on the first day), so we had to rush a bit on the first day and shortened the hike on both days. Still, the landscape was absolutely stunning, and Todor worked with us to make the best plan considering the conditions. Once we reached the hut in the early afternoon on day 1, we were stuck inside the rest of the day with not much to do due to the rainy weather, so Todor gave us a Bulgarian history lesson, taught us some Bulgarian words, and helped us learn to read Cyrillic. On day 2, we skipped the Malyovitsa Peak because the thick fog would have obscured all of the views and instead hiked down a different route, stopping to see some of the herds of horses and pick wild blueberries, then descending through a beautiful forest. Since our shortened hike ended earlier than expected, Todor gave us some options to fill the rest of our afternoon, and ended up teaching us how to make the traditional pastry, banitsa. When he dropped us off at the train station, Todor went absolutely out of his way to help us change our train tickets to Varna, as I had inadvertently neglected to reserve a sleeping compartment for our overnight train trip. Despite the non-ideal weather, the hike was still absolutely the highlight of our 9 days in Bulgaria (although I loved everything we did!). Traventuria made it very easy to take on this challenging hike, giving me peace of mind that we would be safe and secure and simplifying my trip planning as they took care of all of the details. I would highly recommend using the company, as well as using Todor Nedkov as a guide.