I've been using 4 AmeriCaire mini splits for 3.5 years non-stop, other than replacing a contactor on one of them($20 part, 10 min to install), they've been great.
Just added 3 Soleus Air mini splits 6 months ago, so far they've been great.
I installed them and had an AC contractor do the start up.
They are inexpensive China AC's, but they have a quality look to them, and obviously perform well. I could have bought any brand I wanted, $$$$ wasn't an issue when I built the rooms they are cooling.
Glad to hear of your positive experiences! I really am interested in any anecdotal evidence like this.