Received a letter today from a firm that protests property taxes

[Cliff T.]

Hi all,

I received a letter today from a firm (Texas Tax Protest) that claims they will negotiate your property taxes down on the owner's behalf. Has anyone dealt with this type of firm before?

The cost is $295 and if they don't reduce your taxes by more than $295, you get back the difference (i.e. there's 0 risk for hiring them and only upside).

Seems like a win/win proposition and reviews online look solid. I've only found negative reviews of folks who either 1. got refunded immediately because the firm stated they couldn't represent the property owner for whatever reason or 2. got refunded after the firm tried and couldn't get them a substantial reduction.