I'm not sure if you picked your subjects yet, but here's my perspective as a current Hext student
We just finished the What Is History? component of the syllabus and it has been amazing. A lot of that can be dedicated to my teacher, he's amazing and he enjoy's it just as much as us students. It really changes the way you perceive texts, not just history. The concept of historiography is also relevant to subjects such as modern where you deconstruct sources, and English in Mod A.
It's a highly philosophical subject and you have to be very open, analytical and adaptive to new concepts all the time, and compare and contrasting different ideas. The main point I'm getting to here is that it makes you think deeper than any other subject, and that's what I personally enjoy.
The Major Work so far has been fun, although very time consuming. The hardest part was actually making a decision in regards to a topic - I searched and searched until I found something I was passionate about, which I think is necessary.
A negative point is the amount of time needed vs units. As a one unit subject hext really places a heavy workload on students (atleast for me) and you have to acquire a solid work ethic and the ability to work independently.
So, overall amazing, if you are willing to put in the work. PM me if you have anymore questions (although I still have to do the case study section).