I did my Erasmus studies in BOKU and my experience was unforgettable. The university is more than friendly to students from abroad so they helped me with everything plus the website is very helpful and organised. The study program is quite “free” since more courses are not mandatory but you chose them . More than that there are a lot of courses taught in English, most of the professors were very friendly and reachable and also there are German courses offered for Erasmus students and the teacher is just great! 😀
About the level of the studies I could say from what I saw that it offers the basic level of knowledge and not very specialized knowledge .
In any case BOKU was a great option and an amazingly organized institute!