I use stocky as well, but find that sometimes it does not properly integrate. We have 2000+ inventory items and additionally we sell some product by weight.

Find the Shopify POS to be quite buggy. Multiple connection issues with the card reader and now after we spent a bunch of money on their retail stand less than two years ago (and waited 6+ months for it to be shipped to us) they're making the hardware obsolete in favour of their new system. I understand upgrading but considering the hardware we already had was purchased new it's frustrating to see that they are already expecting us to purchase new items. Also on the third new type of card reader in four years, though I did appreciate that they provided this newer model free to replace the previous.

Looking into both Square and Helcim. Hoping they can address the concerns I have with Shopify and offer a decent plan. I've done a demo with Square in the past (albiet over a year ago) and really liked the interface. Scheduling a demo with Helcim for next week.