Rollup Helper makes it so easy to get the information you need in the places you want. There are no limitations by Master-Detail relationships so you can roll up virtually any field you need, including activities! Review collected by and hosted on G2.com.
Their website could use a little updating with more use-cases. Review collected by and hosted on G2.com.
It's easy to use and essential in making sure data is consistent across numerous objects. Aggregating Data across numerous objects into one field -- a piece of cake. I love that any custom object is supported, you can aggregate numbers or text, and custom logic is super easy to configure. Review collected by and hosted on G2.com.
Depending on complexity - you can run into a few Data Lock errors - but their support is top notch. Be careful in how many scheduled roll ups you have - try to leverage their instant update feature. Review collected by and hosted on G2.com.
Roll Up Helper has been key in helping our Salesforce Org display data ('roll-up') data across multiple objects. Salesforce has limitations in how many roll-ups (and what field types) and this has been a life saver for us, especially without having to do any custom coding. Review collected by and hosted on G2.com.
I do think the UI could be improved upon in Salesforce. At first several uses it's a little difficult to get the roll up scheduled to run (real time, etc), but once you figure it out it's great. Review collected by and hosted on G2.com.