I've found Once-a-Year don't hold to their guarantee either. I've had very obvious dead spots growing on my lawn since last Fall and nothing was ever done to correct the situation. The techs would come regularly and just do their thing and leave the receipt, no suggestions or recommendations. This should have been taken care of months ago. We hired them to make sure our lawn stayed green and beautiful... simple concept. Our lawn now is the worse one in the neighborhood. Where I come from, a guarantee is a guarantee. Their "guarantee" is maybe covering 10% of their cost to fix my lawn. Don't believe it when they say they guarantee their work!... The only thing they guarantee is to bill you more for their mistakes.