I run a Deco on the master out on all my current tracks.
I like it a lot. It's really easy to go from subtle, to super saturated tape phasing.
The deco will ultimately "color" the sound when activated.
Each mode is quite different from each other too.
Sum, is kind of the basic tape phasing emulation and has a rich full sound. It's the one I use the most.
Invert, can somewhat act like a high pass filter phasing thing
Bounce, is the weirdest one. It will definitely sound different on the left vs right, this bothers some people.
Some tracks sound better with bounce as opposed to Sum. It kind of sounds like some stereo widening type effect.
All my tracks posted here are using Sum most of the time, and sometimes switching to Invert.
The track Coms1, is using Bounce only.
I dont have a Heat, but I've used one.
They really are not in the same league.
I absolutely love the deco, and wanted something special to kind of glue/color my entire sound.
It does that, and although it's a fantastic effects pedal, it's going to color your sound like an fx pedal will, it's not going to make your sound clean and crisp.
The Saturation is nice to, I usually have it set to something really subtle, unless it calls for over driven crunchy goodness. Again though, not even in the same league as the Heat, but I highly recommend it.