I have had their Premium programme for a few years and stuck with them since the results were decent (but not great) for the price...
This year, when their team came out to apply the treatments they did not bother to notice that my grass was dying in large patches and the lawn turning brown. When I brought it to their attention, they said it was due to chinch bugs, applied a spray to kill the bugs and promised an overseeding treatment.
When I emailed them more recently to confirm the overseeding appointment, they replied saying they had no seeds, since Covid had stopped delivery from the US, and would consider doing the overseeding next year. I asked if that would require me to buy their 2021 programme but they did not reply. I have since reached out to them a further couple of times via email (no one picked up when I called nor did anyone return my call) but no response!
I am currently shopping around for another lawn care provider.