I have had the exact opposite actions from ESI....they have been outstanding every time i have had to deal with them including replacing a system and 7 circuit cards under warranty that were damaged by an electrician and could have been exclued from warranty coverage.

The one time i had serious issues with a large system and a PRI (turned out to be all carrier issues as ESI said) they worked very hard to resolve it.

I was a BP for another product before ESI and i couldn't even get a response from my rep.....let alone tech support.