I've been a WPMUDEV user for years and have relied on a small subset of their plugins as mainstays of our client sites. Today I ran into some issues with a third-party plugin that was misbehaving, and wasn't playing well with WP Smush Pro. I opened a support ticket using WPMUDEV's integrated Chat Support through my WP-Admin Dashboard, and worked for a time with a very knowledgeable and patient rep (Ohid!) who ran tests, gathered information, and even logged into my site using WPMUDEV's "Grant Access" mechanism, which avoided all the hassle of creating additional user accounts. After more testing and discussion, he was able to provide a thoughtful solution that worked around the other plugin's shortcomings. An outstanding first interaction with their support team, so glad I had them available!