I have had some issues with my standard CC/Debit card system over the couple years its been in use.
I did a little number crunch on the fees relative to gross and it looks like it costs me about 5% average to use my card processor.
When the middle men compete w each other, they talk about per swipe fees, usually .5-.25 cents. And also % of transaction fee, anywhere from 1.25%-1.5+%. And some cards, like rewards cards end up demanding a higher fee. And the CC fee is different than the debit fee. Its all hard to really keep track of.
We offset these fees by charging the customer .50 per CC/Debit transaction. Only a few people balk at this, but its just a convenience charge. I could also charge more overall and give a "cash discount". Anyway, same thing.
It seems like the thing with square is dealing with any demand for a printed paper receipt. On a smart phone, you can email them the receipt. If I were them, I wouldn't go that far as to get it emailed to me. Seems ridiculous for a lunch receipt. For the ipad, it seems like there are receipt printers that are compatible with the ipad interface. They cost $280 when I looked around a little on ebay for the brands they provided.
This would satisfy anyone who wanted a receipt for a CC/Debit transaction. In my experience, I would say about 20% of those transactions, people want receipts. It would also give you an opportunity to print out sales info (presumably) from the register software you use.
I use a receipt printer currently with my POS and most of the tape that comes out of it is used for printing out large orders and delivery/call in orders, and for end-of-day sales info. This is good for when employees count the till and see if there are any discrepancies.
One thing I wonder about with Square is a feeling of putting my eggs into one basket, so to speak. Where I'll get hooked into this system, and they either raise their %, or I'll find the app is limiting in some way that a traditional POS is not. Tho, there is such variability in POS software. And currently, I am paying way too much (5%) to take CC/Debit. I could use the extra 2.25% of gross to pay for the ipad and printer.
I will probably make the decision when I figure out what kind of other technology accessories I will have associated with the rig. For example, will I try to put a CLEARwire router on the truck for internet? Or does it make more sense to have a 3G capable ipad. Probably the latter, tho with a broadband receiver, I can be a hotspot to other devices, including an ipad, if necessary.
I am not that familiar with data usage limits with smartphones and other devices, as I do not have a smartphone currently. I wouldn't want to get into a situation where I am paying too much because I find my needs go over the limits. That is where wireless might be better.
I haven't found info on whether you can use a square with an ipad on just a wireless connection, or if you need to be 3G connected.