The drip is definitely normal, especially since here in Houston, where it is darn humid.
I use filters like these, and my thermostat blinks at me every three months to tell me that it's time to change them, so I do.
I can't imagine that there's anything that the AC guys could do that would help other than making sure that the fins in the indoor unit are clean and not clogged.
I would want to research a reputable company. I don't trust
some of these goons any further than I could throw them. I'm sure there are plenty of plumbers, electricians, hvac, mechanics, etc... that are honest and have integrity, but I like to try to protect myself from the ones that don't fit that description as much as possible.
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa

SOLD 2004 - gone but not forgotten