The benefits would be similar to those over any other transport (like RabbitMQ). While TIBCO can do more than a lot of messaging systems, it also depends on how much you want to do inside it vs. in your application using TIBCO.
Where I work, we interact with TIBCO regularly but a different team manages that and we just consume services. We do use MassTransit with RabbitMQ and MSMQ (yes, both).