A lot of feature feel unfinished and many things are not intuitive. I wish they had an active community forum get real world examples of how people are using it.
Some of the things I've come across include:
1. there is no way of knowing which "tags" will work properly when you set us a receipt or letter template. If you choose the wrong one text will be missing from what gets sent out to your donors.
2. Causes, which allow you to set up teams to raise funds for you, are confusing to anyone not familiar with kindful already which makes it hard to get others to use it.
3. You can not self import in kind (non-cash) transactions.
If this is the first time you are using a donor CRM see if you can get a trial run and import real data. Use it to practice setting up letter/receipt templates, causes etc to make sure it will really do what you need.