In general, consider "automatic" adjustments to service based on conditions (effectiveness, weather). E.g.: For pest services, it's a bit pricey - 60/mo for checking traps and spraying foundation. But we need it, so that's fine. Maybe come more often when weather is bad to clear traps (especially in summer when hot- mice come in as well, then begin to decay immediately; waiting up to 2 mos isn't good). For mosquitos- it's not as effective as it needs to be. Maybe do a spot check to see how effective the treatment is. If it's not effective enough once every 3 or 4 weeks, come more often, without me needing to ask.
Exceptionally attentive service, all staff are helpful and responsive, my experience to this date is that technicians are knowledgeable, engaging, articulate, and trustworthy…..