OutSystems

You don't need to be technically expert to work on this tool, its easy to learn, if you are logical & having development experience in any technology - all tutorials with practical implementation & study material are available online over the Outsystems Portal.
Easy to implement the responsive design with complex features using ready made template & tools available over the forge library.
Community with Outsystems experts is 24x7 is available to help you. You will always get best solutions through this community & expert advice's as well.
Development is fun with Outsystems, if you have ever worked in .Net or Java you can easily compare the features offered by this Tool like consuming & exposing API's, Integrating with Other systems, Asynchronous services like Timers to process the heavy job or large amount of data.
In terms of security, you don't need to take care mush about it, platform itself take care of most the things by simply enabling & disabling it at platform level.
In terms of performance, you can easily maintain the multi-tenant application with tons of records.
Flexible enough to customize and reuse.
Having the option to create your own component using .Net extensions and compile the same in your environment and use it in form of action/functions.
No need to have separate Dev-ops team, Outsytems provide the Lifetime Inbuilt tool to manage the release and deployment at single robust platform, also provide the concrete analytical report of production environment.

There are few restriction while using Outsystems Platform like you cannot play with systems entities or core platform components.
Sometimes, it become challenge to migrate data or application from one platform to Outsystems.
Performance & scaling can only be achieved only if you are expert in Outsystems otherwise it's difficult to achieve the bench mark for large application.

Creating applications with such ease, modifying and republishing all the way to production has never been more easy.

The transparency on the ideas that are supposedly 'on their watchlist', I would like some more information/insight on this.

Is extreamly easy to: write or reuse code, integrate with different sort or services or platforms, develop a single mobile app and submit it to different platform stores, review Architecture and code best practices and.

Also, it has a wide learning portal in which you can find all the training courses COMPLETELY FREE. Because of that, is really easy to onboard rookie developers with not knowledge in Outsystems .

At the beginning, I did not feel very comfortable with Support team but, now, they got really better. We have a weekly meeting in which we can follow up all of our tickets and issues. The response time is very good.