Start by matching the shower to the bathroom you actually have. In older Mississauga homes around Port Credit, Streetsville, or Clarkson, main-floor bathrooms are often small and sit on a raised subfloor, which affects how easily you can build a true roll-in (zero-threshold) shower. In many condos near Square One or Hurontario, the concrete slab and shared plumbing can limit drain placement, so a low-curb shower is sometimes the smarter, cleaner build. A good installer will tell you which one your space suits before quoting.
Our advice: if the person using it relies on a wheelchair or walker now or likely will, go with a proper roll-in shower even though it costs more and takes longer to install. The zero threshold removes the single biggest fall risk, and retrofitting later is disruptive and pricier. The trade-off is real, a roll-in usually means more demolition and drainage work, and in a condo it may mean board approval and extra waterproofing. If mobility is steady and the concern is a high tub wall, a low-curb shower with a built-in seat and grab bars is a sensible, less invasive choice.
Whichever you pick, prioritize built-in seating, properly anchored grab bars, a hand-held sprayer, and anti-scald controls. Ask specifically about experience with senior and accessibility work, not just general renovations. Confirm the contractor is licensed and insured, ask what the workmanship warranty covers and for how long, and find out their service response if a valve or door fails. Mississauga winters are hard on entryways, so also ask how they'll protect floors during the messy demo days. In our experience, the installers worth hiring walk the bathroom in person, measure the threshold and drain, and explain the plan in plain language before anyone signs anything.