I just did my KPMG test and I got 75th percentile result which I am told is a decent result given the renowned difficulty of Cubiks tests. KPMG uses Cubiks test and is considered to be the hardest of all Big 4 accountancy tests. PwC uses SHL(fair), Deloitte uses Kenexa/PSL (fair) and Ernst & Young uses Saville Swift Analysis (easy) tests. However, KPMG has been using Cubiks whose tests are the most challenging not only in accountancy but in the entire graduate recruitment industry.
In case you are expecting online assessment, note that KPMG will require you to take 2 online reasoning tests, namely, Numerical Reasoning and Verbal Reasoning tests.
The Numerical Test consists of 24 questions with 20 minute time limit. The level of difficulty varies and proper preparation using tutorials is a must! I think the best place to learn how to get a top score is from GraduateMonkey (just google the name). You will need to look for Kenexa type tutorial they have which I think may be the closest thing to Cubiks tests. I used graduatemonkey tutorials myself, very well organised into data types/contexts so you will remember different types of problems. On the downside, their Ebook is available online only although their tutorial videos are helpful (showing shortcuts, etc). It took me 4 days to prepare using their material and I got 75th percentile on my num ! I failed my KPMG test last year with 34% score and I still regret not paying attention to the test. but i improved this time which means we can all improve.
The Verbal Reasoning Test consists of 40 questions to be answered in 20 minutes only. The key is to read the questions very quickly FIRST then look for answers in the paragraphs. You will still need a lot of practice and proper tutorial. JobTestPrep and assessmentday practice tests should be good to practice. I prefer assessmentday because they provide the same material in bigger quantities but cheaper price - so you have lots of practice if you have the time!
Anyway, the BEST of luck to ALL of us who are now applying to grad schemes !!!