If you have a job opening or a high turn around rate like we do. (we are a staffing company) [CareerSiteBuilder] is a great place to to start. It is affordable and reaches hundreds of potential employees. When you search resumes sometimes when you enter keywords you have to play around with it to find the right phrasing. Its not difficult just time consuming.
Quick adaption came from the ease of use and that is why I would recommend it. If you need more robust cascading goal capabilities you might have to work at it
Although the old interface was easy, it still can become convoluted at times if an employee has multiple managers. They need to make it easier to for employees who have a manager and a top level manager that need to also see the review.
Reviewsnap's old UI does not allow for employees who have 2 same-level managers. This is an oversight that needs to be addressed.
Reviewsnap has been comparable to most the systems I've used in the past. I wouldn't say that one of the systems I've used and mentioned above sticks out far above or below the others.
Overall, we have enjoyed Reviewsnap as it gave us all the functionality and ease at a very reasonable cost. That will be abruptly disrupted on December 31, 2018. We will be forced to make a change.