I still have and use my Blink from 2011. There are a few issues with the unit. Searches on here will locate them and how to fix them. The first problem is the one you found out about. The handles have trouble dealing with the full 30a rating of the unit. These units were sold to LEAF and Volt owners whose cars could only do 16a charging. 3 or 4 years after that, as cars that could charge at higher amperages started to use these EVSEs, both private and public, some of the handles started melting, the most public being Tony Williams' RAV4EV whose inlet port was destroyed. Blink's response to this problem was to remotely program the units to charge at 24a max, rather than replace the defective handles. User GlennD here has had good luck soldering old Blink handles to beat the problem. On my personal unit, the handle failed because of a broken wire, so I replaced the cable and handle. There is a service menu that can be accessed to force the units back to 30a if one wishes to.
The second problem was false errors from the GFI function in the unit. This was fixed under warranty by Blink for folks who reported it during the warranty period. The general cause was bad crimps on the wires going to the current sensors. There is a thread on here that links to a detailed procedure that can be done by a handy enough user to fix the problem.
The final problem these units have is a tendency to have their firmware corrupted. The firmware resides on an SD card, which can be copied and saved so that you can make a new card if that ever happens to you.
Despite all this, many of these are still working fine and the units have lots of features that other units don't have, like fairly sophisticated scheduling of charging and the ability to track dollar cost of electricity based on time of use rates. They also log usage to the Blink site, and I can still access 7+ years of charging history even today.
2014 Rav4 EV, Blizzard Pearl White
2011 LEAF SL w/QC, Blue Ocean, returned at end of lease