Dolibarr is very stable. We use it since the beginning of the creation of our company. We applied all updates without ever losing data. The team is nice we met them at the open source show. We have some paid modules including customer subscriptions.
In the future, we will base ourselves on Dolibarr's operation for some of our development. The implementation of the REST API should allow us to exploit the stability of Dolibarr including the product WpShop.
The task and project management part is well completed. However, it lacks usability.
This ERP is part of the best open source ERP for several years with Odoo formerly Open ERP. From our point of view Dolibarr is the most suitable for small businesses
The conviviality is not always at the rendezvous. The use is a little heavy and not very beautiful. even if, one will note efforts on the last versions ... Update management could be simplified and automated.