What do you like best?
Simplified format, easy to use and there's no fuss, no hidden costs and does exactly what it's supposed to - which is setup questions, do reviews, manage a cycle and collaborate with your employees.
What do you dislike?
It's too simple. From an HR perspective - sometimes you want more functionality like linking with your HRIS, more complex message and feedback process, more streamlined tools to flag certain comments, questions or things an HR person may not see unless they read each and every review.
Recommendations to others considering the product
What does your organization need? Do you need something simply to just do reviews? Then great - pick Small Improvements. Will definitely solve your problem. As your company grows, gets more complex and you want to incorporate org changes, compensation evaluation and integrate with HRIS - this may not be the right tool - yet...
What business problems are you solving with the product? What benefits have you realized?
Performance Management is typically what every employee hates doing. So why make it complicated? Problem we solved is asking 3 simple questions (3 successes, 3 opportunities and 3 goals) and rate yourself. Then have your manager do the same. Simple. But in that simplicity - sometimes you want to break down data more, do something out of the ordinary... and so that's the gamble you play with going too simple.