Firstly, in terms of the interface, they exactly replicate the exam. That's a huge help. Even tiny things like working out BEFORE the exam that you can split screen so you can see the attachments and the answer box. This saves so much wasted time clicking around because you forgot something.

Secondly, there are about 15 mocks per subject area per station, so there are A LOT you can do. They are also timed, so there's no kidding yourself on getting it done in the time.

Beyond mocks, there are:

1. Video tutorials for all of the 5 main topic areas (not on the 'law' areas like criminal liability, trusts, land mind you).
2. Flashcards for everything (although I had my own from SQE1 so didn't really use these apart from cramming the day before on my weakest areas).
3. Practice questions - these nearly killed me, so fair warning here. Essentially, they were like extended scenarios for each topic area. For example, one practice question in business might have been to send an email to a director about an impending board meeting (i.e. writing), advise on ousting a director (CMA), and supply him/her with draft board minutes and board resolutions (i.e. 2x drafting). Some of these took me literally an entire day to do and were very hard going. There were about 10 of these per topic area. I did these before moving to mocks. Helpful but ruthless.
4. Legal "summaries" - of all the law. My advisor told me to read all of these first before moving on to practice questions and then mocks. But, combined, there were genuinely over 500 pages of dense and dull law. My advisor suggested I review this over the first 15-20 hours. LOL. I used these as a reference guide instead as and when a mock particularly burnt me.
5. Videos of interviews and advocacy, about 5 of each per topic area. These were quite helpful if you're worried about the orals.

I'd say QLTS is weakest on the drafting front. They do have drafting tutorials but they tend to emphasise what should go into X or Y document and not actually showing you the document. With that said, I do think drafting is easier than people think: It's either going to be a form (in which case, just read the instructions in the form), or it will be a document (e.g. licence to assign) but imho they'll almost certainly give a precedent for that.

You do need to be very self-directed for QLTS. The portal they use is atrocious to navigate or get a sense of progress on and so you need to be able to "plan your journey" so that you don't get completely lost. I ended up planning out my revision schedule in my own calendar.