Both CE and professional are IMO quite capable with unit testing, as for my own test suite; nope never seen the need.You don't use automated testing? Assume it's due to you writing your own test suite then I hope.
Again, it's all dependent on the project, just know friends where work purchased the Enterprise for them due to that.
I've just never been able to quantify the value in complex test frameworks and/or automated testing -- still waiting for someone to prove to me that there is 1 major thing I have been missing all this time that could overnight improve my code. Plus I work across multiple languages and testing frameworks vary quite a bit, so I can't be bothered with too many fancy things, rather just stick with the more basic unit testing that easily integrates with CI.
OverallI I'm less frustrated by testing, because my code for the most part (>70%) is just pure functions, so testing is hardly ever surprising.