The best thing about this software is that it helps me to find out which parts of my website are not performing well under heavy loads. It also allows you test your server configuration with different parameters like CPU/RAM etc., so as per these configurations I can improve them further in order to get more traffic from search engines or social media sites. There's nothing much bad here but if there was anything then its would be price factor because at present time we cannot afford such expensive products easily. If you want to increase performance while hosting multiple web applications using Apache webserver then definitely use stresstimulus. We have tested our application upto 100K concurrent users without any issue by increasing RAM size up to 32 GB alongwith 4x1TB SSD drives. This has really helped us to scale up quickly when compared to other competitors who were unable to handle even 10-15k concurrent user count due to their.