I have been using Mike and his team at Big Time Pest Control at our house for about 4 years. When we first used them we had spiders and webs all around our house. After the FIRST spray, the critters were gone. We have not had issues with ants, black widows or even spider webs in the garage. They are amazing!
They spray every 2 months and with our contract will come back any other time in between scheduled service if needed. I've used that a few times for wasps and occasional things and they always came out that day or the next day. Such friendly people and easy to talk to, you can see that they care and listen.