I like how fast we were able build our first form with this tool! We didn't need any assistance from their team as they had everything already set up so well! The only thing i dislike about them was there site crashed one time due to too much traffic but other than that no complaints at all!! So far nothing has been improved by us since implementing sintels studio into sharepoint 2013 enterprise edition. Our new customised survey took less then 5 hours once we got used to building things ourselves instead relying solely upon templates/forms provided through software companies such as salesforce etc..