What makes a great glass igloo
The glass roof is only the starting point. The igloos guests rate highest combine heated, frost-free glass above the bed with a private bathroom, enough floor space to sit as well as sleep, and blackout curtains for the light summer nights and the morning after a late aurora.
Size varies enormously. Many classic igloos are 19–25 m², which is essentially a bed with a view. Two-floor suites of 40–60 m² add a living area, a kitchen or kitchenette and, at the top end, a private sauna and outdoor hot tub. That difference matters most if you stay more than one night or travel with children.