Start with how the device actually detects a fall and how often it cries wolf. Montreal homes are full of things that fool cheaper sensors: hardwood stairs in a Villeray triplex, tile in an NDG kitchen, the sudden sit-down onto a hard chair. Ask the retailer about false-alarm rates in plain terms, and ask what happens after a fall is detected: does a real person answer, and can they reach services in French? A monitoring plan that only speaks English is a poor fit for many Montreal families.
Next, decide between a pendant and a watch. In our experience, a watch wins for most seniors here. It gets worn all day, survives handwashing, and doesn't get left on the nightstand the way a pendant does. The trade-off is honest: a watch is pricier up front and needs charging, so a parent who forgets to charge things may be safer with a simple pendant. If your parent spends winters mostly indoors and struggles with small buttons, lean pendant.
Buy from a retailer with genuine seniors' experience, not a general electronics shop. You want someone who'll explain the monthly monitoring commitment clearly, confirm cellular coverage in older stone buildings with thick walls, and stand behind a warranty with quick service if the device fails. For condos downtown or in Griffintown, check that the device works on cellular so you're not tied to a landline. Fall detection setup in Montreal is usually light, often just pairing and testing, but a good retailer walks you through it and checks range room to room.
Our recommendation: choose a watch-style device on a bilingual monitoring plan from a retailer that offers a home visit or thorough phone setup. It costs a bit more each month than a bare pendant, but reliable detection and a responder who speaks your parent's language is worth it. The trade-off is the ongoing fee, so budget for the plan, not just the hardware.