I had three door contractors look at my exterior office doors, trying to solve a persistent problem with electric latching & unlatching. One gave up, one proposed complete door replacement. Vortex proposed starting with a modest tune up of the hardware to see if that solved the problem. That did make the doors close and latch reliably, so it was a big improvement. Unlatching was still unreliable, do they came up with a complete package to upgrade the latch system. The techs were friendly and on time. They completed the project on time. My doors now work perfectly. I'll certainly be using Vortex for other projects.