Long-time HERF Cool-a-dor owners, how's your experience been so far?

Looking into getting one of these soon so I can buy more cigars without running out of room. How well does it seal? is it airtight? Has it stayed sealed well for the duration that you've had it? Does it hold humidity well and keep cigars in good shape even if I start with only 50-100 cigars inside? lastly, how do you personally keep it humidified? are Boveda's still the way with a humidor this big or do you prefer electronic humidifiers for cost savings? Let me know what you think of these big bois!