I'm liking the possibilities that the Pacer allows. I read several comments online where comparisons were made to the Behringer FCB1010. I've had an FCB1010 for several years now but the Pacer is functionally more advanced. I like the ability to send a more complex sequence of messages (up to 6 at a time) to what I'm "talking" to. Here's the rub... getting whatever you want to program to work with the Pacer. This has meant digging in to the "MIDI Appendix" of several user's manuals, (I have a few guitar modelers and rack FX units). Some of these manuals are written better than others and, quite frankly, the manual for the Pacer could have more examples illustrating possible communication scenarios. What worked for me is to use my laptop to both monitor and communicate MIDI messages to my rack gear. Once I was able to figure out what worked, I duplicated those commands on the Pacer. I highly recommend this MIDI controller but don't buy it and expect to use it at a gig that night... you'll need to spend some time figuring out exactly what you want it to do with the other gear you have.