It is not an exaggeration to say Adam Bien is pretty close to a "household name" in the Java world. Adam is a long time Java enthusiast, author of quite a few popular books, Java Community Process (JCP) expert, Oracle ACE Director, official Oracle Java Champion and JavaOne conference Rock Star award winner. Adam most recently won the JCP member of the year award. His blog is amongst the most popular for Java developers.
Adam recently took WebLogic 12.2.1 for a spin and was impressed. Being a developer (not unlike myself) he focused on the full Java EE 7 support in WebLogic 12.2.1. He reported his findings to Java developers on his blog. He commented on fast startup, low memory footprint, fast deployments, excellent NetBeans integration and solid Java EE 7 compliance. You can read Adam's full write-up here.
None of this of course is incidental. WebLogic is a mature product with an extremely large deployment base. With those strengths often comes the challenge of usability. Nonetheless many folks that haven't kept up-to-date with WebLogic evolution don't realize that usability and performance have long been a continued core focus. That is why folks like Adam are often pleasantly surprised when they take an objective fresh look at WebLogic. You can of course give WebLogic 12.2.1 a try yourself here. There is no need to pay anything just to try it out as you can use a free OTN developer license (this is what Adam used as per the instructions on his post). You can also use an official Docker image here.
Solid Java EE support is of course the tip of the iceberg as to what WebLogic offers. As you are aware WebLogic offers a depth and breadth of proven features geared towards mission-critical, 24x7 operational environments that few other servers come close to. One of the best ways for anyone to observe this is taking a quick glance at the latest WebLogic documentation.