I like most about mockaroos ease of use as compared with other tools we have used before such as red gate's sql server manager or Devart DataFactory etc..
It doesn't provide any native way for integration tests but there are many ways you can write your own scripts using their api if it suites you needs. Their support team has been really helpful when i had some issues while writing my first script which was not supported by them yet so they helped me out quite fast! The only thing that could be improved would be its pricing model (it should come down at least 1/3rd). We needed something easy-to-use product where our testers did no need coding knowledge nor experience.