It is very easy to use, it's pretty flexible once you learn how everything works (if there are any learning curves). I did not like that some pets had issues when transferred from one pet sitter to another; we've learned though as they have improved their system over time! We were able solving all our problems related with transfers by using this software - so far nothing negative about what they offer out-of-the box for free users. Our biggest issue was finding someone who has experience working with large animals such as cats/dogs/rabbits etc., which is why we decided upon PPS at first since we thought maybe other companies might be too 'petite' compared to us being experienced business owners ourselves, but luckily now everyone seems happy having used them and can't imagine going back without.