e-GMAT's Quant Scholaranium has more than 700 very good quality GMAT type questions for practice which is very helpful for those aiming for more than Q49. The dashboard has a very nice pictorial view of your progress. e-GMAT has a nice strategy for timing called 'tact time' (please attend their free strategy session to know more about this if you think that you have time management issues). The dashboard shows your tact time for each category of questions, which helps you in improving the areas where you are taking more time to solve the questions. I have Q49 in my first attempt and I found medium and hard difficulty questions very challenging, but still very GMAT-like.
The solutions are nicely put with the approach first and the working out afterwards. Understanding the approach part helped in handling the questions in better way.