I always use this extension in my browser for script recording which gives me best opportunity of recording. When i convert it to jmx and import in JMeter it is very ease to use those all calls.
Its user interface is great as iys easy to use and very helpful in performance testing. I use blaze meter along with jmeter and it provides great graphical representation.
The tool is excellent and I have used it for a long time. It gives a nice visual presentation of the performance, infographics, and most of all detailed reporting.
The customer support is poor, whenever there is an issue, it takes days to get feedback from the community.
I signed up for the Pro plan earlier this month as I wanted to test with 4k users on our deal of the day site which was crashing at bad times i.e. whenever we would put up a deal.
Even its easy to use, It is little bit confusing for begin. Some time it crash while click record button.