The UI is very intuitive, easy to use for even non technical people who are not familiar with code writing or development tools like Javascript etc., I personally had no issues while using it as my first app was simple enough but then later when i used more complex features of this tool which required some coding knowledge alongwith experience in JS/JQuery API's (which can be learned easily) - there were few minor bugs here nd therw where we needed help from their support team at times so far they have been helpful & responsive! If you want an outsource solution without having your own dev resources available try them once!! Their pricing structure makes sense too if one understands what exactly he wants done within his budget range than its good otherwise go ahead wth other options also considering time frame involved before delivery date :) We wanted something really quick turnaround rate since our clients require us everytime whenever new requirements come up hence faster turn around rates would give.
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