Peli & Woolly, and Ariadne IIRC (and us of course) own Octane 3s.
It's a very good tent, but I would reckon a Vango Spirit 300+ to be the equivalent in purpose, but better in build. Both are broadly copies of the Hilleberg Nallo 3GT.
We do camp a lot, but we've had a few issues with our Octane. Minor things, which could be repaired, if I had the skills, the time and the materials, but niggles nonetheless.
Camping on my own in palatial luxury, I would want (in order of preference):
Nallo 2GT
Nallo 2
Spirit 200+
Octane 3