This composter could withstand nuclear attacks, not just squirrel attacks. They're nothing if not sturdy, but I'm not a fan of these Earth Machine composters. They don't have enough air circulation inside the dome.

This may be a good design for the Pacific Northwest, where the tightness of the dome keeps rain out, and the temperature is more even, but it's a terrible design where you get dramatic temperature swings, like we do in California. They may work in Montreal, but I'd look for a design with better air circulation. Look for one with slats, but slats that are too narrow for squirrels to get in.

Where it's hot during the day, and cool or cold at night, you get a lot of condensation inside the dome of an Earth Machine. There's not enough air circulation around the pile inside the dome, so you get a slimy, smelly, anaerobic layer on the outside of the pile, where water condenses and runs down the sides.

If there's a nasty smell wafting from somewhere at the community farm where I have my plot, it's usually because someone has opened up an Earth Machine and turned their compost.

If people turn their compost often enough, this may not be a bad design, but it looks like a "set it and forget it" composter, that's the way people use it, and at least in California, it (usually) stinks.