I know that the reviews on AIMSS are all over the ...
I know that the reviews on AIMSS are all over the map because I looked them myself before taking my dog here for an eye infection, but my experience was ultimately just fine.
My dog developed an eye infection on a Sunday so most vets were closed. On Monday morning I started calling around, but because of COVID vets are impacted and either didn't have any availability same-day or weren't taking new patients. I learned that AIMSS is essentially an Urgent Care type of place and that I could get him in to see a doctor same-day with the knowledge that that type of service would cost $120. My dog's eye infection was bad enough by that Monday morning to warrant seeing a doctor that day and I thought the cost was reasonable.
When I arrived I did find it difficult to see the place (it's behind a big tree) and also difficult to see their parking lot, which is immediately adjacent to their building - between them and the auto body shop next door. I will say that the staff they have answering general phone calls are pretty blunt and uncaring. When I didn't see the parking lot and parked just beyond the auto body shop I called and they asked me to park in the parking lot. When I parked in the parking lot and called they asked me to take my dog to the front door. All of that didn't generate a lot of confidence, but at that point I was there and took the risk.
From then on I'd say that I was happy with the service I received. I got a phone call within 40 minutes of the handover asking a few more questions about my dog's symptoms before the doctor saw him. A reasonable amount of time later I got a call from the doctor herself with a diagnosis. Then a call from a tech with discharge instructions. They handed my dog back to me within 2 hours of me dropping him off, maybe even 1.5 hours. The techs and the doctor were much nicer on the phone and explained everything thoroughly.
Overall I'm happy with the experience. If I were to ask them to make one change it would be to train their general office staff (who answer general phone calls) on being a bit warmer and empathetic with the customers and potential customers who call in.