It is easy to add contacts, notes on them, and where they stand in the lead process. It's also easy to update them to change out whether they're quality or not, they've been won (and for how much), and so forth. Great overview overall.
The bugs. It is way too buggy and there is a learning curve—we have to schedule calls for new members in order to show them how it works and what our own process for updating is.
For the bugs, it's mainly been misattribution and duplicates. Our form passes along parameters, it's all good until Nutshell generates the contact. It'll either (a) clip off some of the parameters, or (b) create a contact with name then create an empty contact with the parameters.
Obviously go for the full web sign-up rather than G Suite integration. Makes your life easier.
We use it to improve our productivity. It is good as a standalone product for reviewing where every lead stands and accompanying information, but it's been used for calls mostly.
If anybody has a question on a particular person, we go to Nutshell to bring them up and see where they're at, plus notes on them. Makes meetings on leads go by faster.