Pros
They hire you very quickly! They value punctuality, time management, quick learning, and efficiency. You manage that, and you're one of their favourites!
They tend to hire persons who have full-time hours available more than part-time hours, because they like securing enough people for their shifts (AM shifts can start as early as 6:00 a.m., and OM shifts can start as late as 3:00 p.m.). They are a growing organization (as of Oct 2023) and they hire new people all the time.
Many of the department staff work hard there and treat you well and would instruct you well and take you under their wing. They really lucked out on the calibre of staff that works there.
Cons
Their safety culture is lacking. You will need to speak up to a supervisor to refuse unsafe work (and be prepared to make a valid argument about why it is unsafe because there are not many glaring risks, but that doesn't mean no risks exist, and don't be afraid to make a call to the Ministry of Labour if that conversation does not go well.)
Their current (Oct 2023) safety committee which should contain at least one employee is one person strong (in management and contains no employees).
HLS does not officially train you on safety, just procedures and productivity (I was supposed to receive a login to complete OSHA training on my own time but never did). They also don't practically train you in safety very much at all. They run evacuation drills, which are successful when no storage and supplies are in the way of the exits, but that's the extent of the safety training.
Their workplace culture on how certain management staff communicate with their employees leaves much to be desired. Don't be surprised if you see a manager shouting at an entire department for over ten minutes and borderline berating them in the plant, or to hear them yelling at an employee from inside their office. Nepotism also exists in departments and with supervisors.
Between employees, it's often a "keep your head down and work" mentality and "a job is a job, do it, get paid, and go home".
If you can endure that level of toxicity to pay your bills for now, game on. If you're preserving your mental health or don't want to drag that feeling of work stress back to your home life, do yourself a favour and apply yourself to jobs that rely on your strengths and that have better reviews instead.
P.S. The probationary period is one full year for you to be eligible to receive health benefits (and get a job letter for those who need one). That might be a common thing with minimum wage and factory/warehouse jobs, but I still think it's worth mentioning as a con.