What is the format of the exam you are going to be sitting? Do you need to do any writing or is it just English Comprehension? I am not personally a fan of Bond. In our area I don't know anyone who managed to get a state selective place just using Bond as because everyone is using Bond everyone gets those marks. The advantage for those who have used other publishers is that they may know things that were part of those papers. I would use IPS, The Tutors and Alpha and save the GL papers to just before your exam if you are doing a GL exam. I am very impressed by the new First Past the Post papers that have been introduced by this forum. Also the new CGP papers are very good. DG
It really is not like that round here. I know people who did nothing and passed. Gl assessment practice papers are the closest to the real thing you will get here as this year it is set by gl assessment - possibly for the last time.
Bond is useful to provide a leg up to doing the practice papers, but is not so like the real thing.
If you want very high marks in kent for a superselective then there are some more tricks, but even the raw score for the superselectives is not high. In kent a very generous proportion of children get grammar places.