I’ve been pretty happy with LogDNA for my personal infrastructure. I’ve got the cheapest plan and it has always worked fine and the 3-4 questions I’ve asked their support team have been answered within a couple of hours.
When my site was on a geodns based vps cluster, I used https://logentries.com/ for log aggregation. Though will get expensive if you have alot of log data compared to self hosted versions.
When I signed up, their tech support schedule a screencast shared session where they actually go through their system and demo everything and field any questions I had in real-time conversation one on one so that I got up to speed more quickly. Not sure if they still do that.