Not an IBMer, but IBM MQ and Sterling Connect:Direct are both solid, I use them daily and they work wonderfully, although they can be a real bitch to set up and use in certain scenarios.

A bit of hyperbole by me since db2 was made in 1983. But MQ was created in 1993. Sterling was an acquisition. The majority of products that actually work were acquired. Very little if anything of value since 2005+ that was actually IBM created. (Bob appears fully IBM created)