Hello there, I'd be happy to answer questions you have about the uni and Stara Zagora. Personally yes, I would recommend the university for a number of factors. The university itself on the inside is not the most modern, but it has good facilities as well as good anatomy classes with real preparations starting from second semester, first year. The University fees are also not too expensive and your fee cost will stay the same for your whole stay, even if they increase the price for new students. Also, the student supervisors are very helpful, and help you get a Bulgarian ID along with health insurance paid for by the University if you're under the age of 25/26.
The professors are as a whole good teachers. Some professors can be lazy, but out of my two semesters I've only had about 1/2 'lazy' professors (in the sense they don't teach a whole load and finish classes super early) and the rest have been very good teachers and answer any questions you have in person and by email. If you make the effort to learn they will see that and will be happy to talk to you after class and in their offices at any time. They will also check your essays for exams and prepare you best they can. As this is Bulgaria, its best to keep in mind not all professors will speak perfect English. I've had about one professor who's English was not the best, but still understandable. Most professors however have very good English for non-native speakers.
The city itself is nice, usually quiet as it is a small city in Bulgaria but there are still things to do. There is a cinema, many bars and pubs, some events in the parks and two large shopping malls. The town also has a good bus system, costing 1 lev per journey. These buses can take you almost anywhere in the town including to Uni. Taxis are also very cheap. The people are usually very friendly with only a short few not being fully warming due to your English speaking (but this is quite rare). Almost everyone tries to help you, even if they don't speak English. Overall the town is quiet but it is a nice place to live and I don't feel unwelcome here. Apartments are also good prices and the bills here are so cheap (as long as you don't over-use electricity and water, for example my bills this month were 16 leva for electricity, and 3 leva for water!).
Timetable in first year is ok, of course it is longer days than school as the lessons are much longer (ranging from 2-4 hours depending on if its a practical lesson or a lecture). Some days you start at 8/9, and you can finish anywhere from 2/3/4/5 depending on the day and your professor. If the class starts too early you can arrange with the professor to start later without breaks for example to shorten the day. Some courses also finish sooner than other, so closer to the end of the year you will have more free periods as different classes finish for the semester. You also sometimes have breaks during the day ranging from 1-3 hours, so you can go to the computer room to complete essays or work or go home and come back later in the day.
Sorry for the essay of a reply! I just thought you could use all the info I could give as I didn't have any when I first joined. Let me know if you have anymore questions.