I'm currently studying psychology and counselling, but not a the open university. I'm in my second year, and it does get intense, especially studying from the psychology perspective and the counselling side. I also had to complete a workbook and a role play in order to obtain the level 2 certificate counselling, not sure if they do it at open university. But it is a good course to get started, I recommend if you want to get into counselling, to start working in job roles than involve helping with others, because I have checked a few master's and they involve having experience with working with mental health etc.
Pros - you get to understand what counselling is like and the importance of understanding yourself. For me personally, I find it very interesting
Cons - don't really have any atm haha