We originally had a Pace sticker and when they introduced Nexus we immediately applied for it. If you don't know what Nexus is, it's a joint Canada Border Services Agency and US Customs and Border Control program. It's designed for pre-approved, low-risk travellers. When you travel by car there are dedicated lanes so the wait is minimal. If you fly there is a function you can add to get TSA Pre-check that expedites you through airport security. The cost is US$50 for five years. If you cross the border frequently, it's well worth it.
Every five years you need to renew. My card was going to expire at the end of the year. I've been told if you let it expire you must reapply. Previously when our card was about to expire we made an appointment for an interview and had another security check. A friend applied for renewal before COVID and is still waiting for his appointment. The website said for renewals to apply up to a year ahead of time so I applied on March 20th.
Yesterday I got an email from US Customs and Border Protection that said my "status" had changed. I thought maybe it was cancelled! It was approved for five years with TSA Pre-check! No appointment, no new card and tomorrow the required antigen test for return to Canada has been discontinued.
I'll wait until the border lineups are short and look forward to cross border shopping.