Late to the love fest (LOL), but have had nothing but positive experiences with Avast.
Well designed and executed products and the customer service is bar non the best I have ever dealt with anywhere anytime no matter the product, service or industry...
Where else would you get an e-mail a week after asking a question, out of the blue, that starts with "I was helping a customer today with a similar problem and thought you might want to try..."
I've also enjoyed building my own equipment - there is an extra little bit of pride knowing you assembled something yourself. More importantly, I have a better understanding of what I have and have not been afraid to modify to suit my needs.
So far here is what I have installed in order: K1 Kalk Reactor, CS1 w/ Swabbie & Davy Jones Locker, Mutiny I Ozone Reactor, MR5 18" Media Reactor and 3 Digital ATO's.
Highly recommend and have no affiliation other than being a very satisfied customer.