Start with one question: where does your parent spend their time? Someone mostly at home in an older Durand or Kirkendall house may do fine with an in-home unit, though Hamilton's stone and brick century homes can have thick walls and awkward layouts that eat up signal range. If that's your parent's place, ask about range and consider a base station plus a bathroom or basement pendant, since falls often happen where nobody's looking. For a parent who still drives to Ottawa Street shops, walks along the Bruce Trail, or visits family up the Mountain, a mobile GPS unit that works anywhere on the cellular network is the better call.
Our honest take: for most active Hamilton seniors, we lean toward a mobile GPS system over a plain landline in-home unit. Winters here are real, and a fall on an icy Westdale sidewalk or in a parking lot at Limeridge is exactly when you want help that isn't tied to the living room. The trade-off is that mobile units cost a bit more each month and depend on cellular coverage, which is strong across the city but thinner in rural corners toward Flamborough or Binbrook. If your parent rarely leaves home, you'd be paying for range they won't use.
Whatever you pick, prioritize the monitoring centre over the gadget. Ask whether the centre is staffed around the clock, where operators are based, and what certifications they hold. Then check the practical stuff: battery life, whether the pendant is genuinely waterproof for the shower (a common fall spot), and how fast the retailer replaces a faulty unit. A local Hamilton retailer who understands older-adult needs and can walk you through setup is worth more than a mail-order deal with no support behind it.