GMAT Club Questions

I have been using the GMAT Club tests and questions for a month – on and off. The User interface is GMAT like. The questions are not the run-of-the mill type. I have learnt a lot by just attempting around 120 questions, and am looking forward to remaining the rest of the questions.
The questions have stats that tell us how many people have attempted the question, the time taken and links to the GMAT club discussions, which show us different ways in which others have done the question.
A small draw back is that we have to select a certain number of questions – max being 50. By default 5 is selected. Many a time, I have put in a number greater than 5 – but somehow it just resets ot 5 – costing me 1 valuable test.