Roughly 700,000 gallons of water pour over Niagara Falls every minute, split across the border between Niagara Falls, New York and Niagara Falls, Ontario. The American side has Bridal Veil Falls and the 1,000-foot-wide American Falls; Canada holds Horseshoe Falls, the 2,600-foot giant. Millions come each year — around 13 million on the Canadian side, 9 million in New York — and many leave dazzled. A fair number, though, leave annoyed, and their recurring gripes are worth knowing before you book.

The biggest complaint is summer crowding. June through August, queues for cruises and observation decks stretch for hours. One reviewer counted about 700 people crammed onto a single Niagara City Cruises boat in Ontario; others describe observation decks where you're weaving through groups just to see the water. If you want breathing room, aim for spring or fall — winter is quiet too, but many attractions shut down.

The surroundings divide travellers sharply. The New York side's state park offers great free views, but the city around it has a rough reputation — a former chemicals-industry hub that declined after the 1960s, and it consistently ranks among New York state's more dangerous cities. Over on the Ontario side, the problem is different: Clifton Hill, the main tourist strip, is packed with horror attractions, arcades and overpriced amusements. A 2023 Casago study even named it Canada's biggest tourist trap. If carnival vibes aren't your thing, head instead to the Niagara Wine Trail, Dufferin Islands, or the pretty towns of Niagara-on-the-Lake and Port Colborne, all within about 30 minutes.

Then there's the bill. Restaurants near the falls charge well above normal rates — travellers report $75-90 breakfasts for two at IHOP, a chain famous for cheap pancakes. Part of the sting is discretionary fees some Ontario restaurants add (IHOP's is 10% for fireworks and maintenance), a practice CBC News reports the city hasn't yet ruled on. Eating outside the tourist zone or self-catering is the easy fix.

A few smaller gripes: cannabis is legal on both sides of the border and some visitors complain about smoke around the falls and in hotels — though smoking is banned within 100 feet of structures in the state park. And the Journey Behind The Falls tour (CA$33, about USD $22) gets mixed reviews; its underground portals can be obscured by ice in winter or a wall of churning water, leaving some feeling they paid for nothing. Many say the free park viewing platforms deliver the best views anyway.

The takeaway: the falls themselves rarely disappoint — it's the planning that matters. Visit in shoulder season, base yourself away from Clifton Hill, budget carefully for food, and lean on the free viewpoints. Do that and the common complaints mostly evaporate.