Castle Serenity model in the home wife and I bought this year. Planned on getting rid of it for wood stove, but you know, plans change...
Lots of minor problems but once we figured them out... obsessive cleaning, taking the damn thing apart to clean, replacing an ignitor and fire sensor, it heats efficienty and well.
It sucks to buy pellets, best deal we've found is $6 for 40# bag of South and Johnson pellets, but it works well for the present. Lots of parts to go wrong. You have to become minor expert to keep the damn thing running! Haven't faced an extended power outage yet this winter...
The Stihl is in garage wondering why the hell he hasn't been called into action this year!