I am now on my second Square Register, the newest offering from Square, and I have to say that as slick as it is, it has to be one of the buggiest systems I have ever used.  Examples:

1. The first Square Register (less than 15 days into setting it up) had to be returned because the chip reader would decide at any given point in the day to reject cards that were being read just fine earlier, simply becasue it didn't like the "angle" the card was inserted.  Reinsert the card slightly pulled to the left, and it would work fine.  Do that for the next 6 cards and it worked great.  Try it on the 7th and it would fail, so you would have to gently wiggle the card about until it found the sweet spot and work.  Would happen at least once a day.  Got so frustrated that Square finally offered to accept it back and replace it, saying it was a reader malfunction.

2.  Second Square Register replacement arrived and now two weeks into this unit, the customer display panel intermittently decides it will not boot up every few days and just stays on the Square logo until you pop it out and reinsert it so the unit boots up properly.  Square tech support says it just wasn't remounted properly.  Funny, considering it gets reinserted and functions perfectly fine for a couple days (so the 'remounting' must have worked perfectly fine) and the register doesn't get moved or handled, yet it decides to just stop working when it feels like it.

3.  Touch screen buttons decide to just "not work" from time to time.  For example: enter a sale with single or multiple ticket items, choose the "discount" category, choose 10% off the entire sale and it works fine.  Follow the same exact process 4 sales later, and the button is non-functional.  You have to go into the sale and open each ticket item to select the discount manually.  Repeat the same original process 9 sales later and the discount button works fine.

Before the SECOND Register decided to start acting up, I took it upon faith the first system was perhaps an isolated incident and so ordered a third system to place in my other store which is on its way.  Now I am sorry I did so because the track record up to now has been lousy.

I am deeply concerned that Square rushed this Register to market without fully testing the system and the software and now customers like myself are paying.  I am now $2000 deep into these systems which should be workhorses for that price, yet they are persnickety and buggy.  You didn't even include Bluetooth in the design for items like wireless handheld scanners which should have been a no-brainer.  

Disappointment on my part is an understatement to say the least.  And for the record, I don't need platitudes or sorrys from Square; I need functional register systems.