Point of Sale

App does work well and is pretty simple to setup. However, you are limited to using expensive equipment and are limited on what should be some basic included features (instore pickup, calculated shipping, returns/exchanges, custom receipts ) unless you want to pay the ridiculous $89 a month. If you are a small business or start up then this may be hard to justify. These features should be standard in my opinion. You already pay a monthly fee for this with your website.
Is it a good app? YES
But as shopify does with the websites, you have to pay more to get basic standard features that should be included.

I have used the new POS app and have to say it isn't as intuitive as the last version which I loved. The product images are really muted and the card payment choice is confusing at first

Not keeping inventory from POS to Shopify Online
Refund to gift card on Shopify Online. Only allows to refund to original payment.

Since the second to last update earlier this week, POS App no longer functions properly with PopM Till. Transaction is completed, the cash drawer won't open automatically (as it should for cash) and receipt won't print until I close the app and restart it, for both actions. Please fix this.

The app itself is ok as long as you stick to the recommended hardware, or it just won't work! (Basically stick to American based Apple products).
My issue is the features it allows in the free version are lacking, that, in retail certain abilities are considered standard. For example the ability to make an exchange on a sale and the use of existing discount codes from the website end (i can tick the box but unless I use pro it doesn't feed it through).
I don't want to pay an extra £80 just for this option, so I have to the calculations manually and adjust stock manually. I don't need multiple outlets or more than 5 staff I can barely afford myself!
I understand the software is different than the e-commerce software, so billing is separate, but someone really needs to look at the needs vs extras because what I need vs what I want are two very different options. Maybe allow a system of choose what you want and charge accordingly... better yet, just allow me to do exchanges and use discount codes on the POS.

Flexible, reliable. Not a fan of new card reader however.

7/21 update - Shopify team reached out and worked with me to resolve some of my issues. The new version is looking promising. Crashes have reduced and returns issue is resolved. Going from one star to three. There are still issues but step in right direction.

June 2020 - I moved my client to Shopify POS thinking it would work out. Finding major issues and challenges.. Challenges - same as lot of folks listed here.. very little control and not able to manage staff at all. Issues - Major bugs like for example 1. on new SHOPIFY app if agent returns/refunds, there is no tracking and it opens doors for major scams.. 2. Hangs very frequently. 3. Order showing completely different Totals and balance on Shopify main app vs. Shopify POS (happened once for now but happened for a customer who is attorney). NO WAY to get in touch with real support folks, the regular support people are promptly available but are kept to handle the client and calm them down and keep saying they would open the ticket but little moves after that.

Pretty much useless. If you are a serious retailer this will not do. Can work for a trade show or two. It does not do any communicating with payment methods, so it is basically the equivalent of using a clipboard to record sales. Only with those you can do exchanges.

This is a good app unless you do a quick sale and need a decimal point on the number pad. I have a fabric shop, where customers buy in all sorts of increments and this POS does not work for this. I contacted support about this problem and their advice was to make customers purchase in set increments - I don't think so!!! I will be cancelling this app.

Generally its a nice implementation of POS and easy to use. A little buggy with the BT connections to barcode reader dropping almost daily. Still missing some major features compared to Square (where I migrated from). My biggest gripes are the lack of options for barcode readers and the card terminal in Australia is a toy - more like a calculator. My customers find the screen on the card reader hard to see, there is a lack of audio beep on payment, charger cable comes out side (ugly) and no cradle for security. Still has a long way to go...! If Shopify provided better options for the card reader and barcode readers that don't cost $600 it would be a 5 star