Ranked in these QuestionsQuestion Ranking
Pro Open source plugin API
Everyone can develop their own plug-ins.
Pro Unified conversations
Ability to merge conversations from the same contact on different services.
Pro Easy to use
Disa is very easy to use and has an open source API, so many new services will be added soon.
Pro Friendly developers and generally good G+ community
Fast, decent replies to questions, even if they've been asked before.
Pro Does what it's supposed to do, without Bloatware
Pro Customizable notifications
Ability to set different notification sound/vibration/led based on the plugin,
Pro Great Material Design
With color-changing design with custom colors for each service.
Pro Many requested features
The developer team does actually listen to the community and adds requested features.
Pro Disa takes privacy much more serious
Currently, the Disa team knows less about you than the website you're currently visiting.
Pro Pushbullet support
Disa works great with Pushbullet, allowing you to answer from your PC.
Pro Many languages
Help and support in many languages.
Con Disa doesen't follows the Google Design Guidelines
Hamburger Menu/Navigation Drawer (Side Menu):
Maybe a Launch screen?:
Con Smaller development team leading somewhat slow implementation of requested features
Though the main development (framework, etc) is moving along fine, things like quick reply and sending multiple images at once should've been in quicker.
Con Closed source
Disa is closed source, so the development speed is capped of their team, no external developer can help or add features that are not on the route of the team.