I've been using WPEngine for 8 years and have been so thankful for there amazing support team and infrastructure. There has not been a problem I've given the support team that they haven't been willing to help me solve. It also gives my clients piece of mind that they have a second round of support available that they can reach out at any time. I recently migrated a client from Bluehost to WPEngine. Without adding any speed optimization plugins there site went from a score of 50 on page speed to around 85. That's crazy!