To update a previous review:
This app is pretty damn good. The payments are all set up through Paypal and automated so neither staff or customers has to worry about collecting/making a payment.
I'm still not thrilled it only works through paypal. I would like to see it work with the Shopify checkout, but that's may just be me.
The number of sales I have had thanks to the payment plans this app offers is amazing. I would not be able to survive without it and recommend it for stores with high priced items for sale.