Splitit itself is fine but the app has very unprofessional errors and the support team is very slow. We only get redirected to other members of their support. I cant recommend this app right now.
The On-Site Messaging App from Splitit allows me to let my customers know that I've got Splitit available at Checkout, and that they can split the total cost over a number of installments. (also, I love how I'm not locked into 4 or 6 installments.) I can customize the look of the messaging and determine where is goes on my page as well. This works pretty well, and I'm sure it will help with my conversion. This is a great addition!