I use Creamer+, the Silkworm 500 series, and the 2 DI 4.
All great sounding, and the wide array of possibilities made them all very usable tools.
I like to record drums using the Creamer on some ribbons as overheads. The gain is great, there is a roll-off in the highs on my Fat Head mics but driving the triode brought out some nice harmonics and make the cymbals sound detailed and beautiful. I also use the Creamer+ as a line level driver in parallel on my drum kit and I really drive it using the pentode mode, I follow that with 1176 compression and what a drum sound; huge, rich, and vibrant.
The silkworms are some of the most variable preamps that I have used. they're nice to have in my rack so I can get some different sounds.
I am a bass player and one the 2 DI 4 is the best sounding DI I have used. It has a lot of colour, but that tube driven in triode mode on my Fender precision is “it”. I’ve been experimenting with bass tones for a long time and thought my chain was almost perfect until this DI came into my life. The nature of distortion is that you often lose bottom end the more you drive it but the 2 DI 4 maintains the lows and keeps them tight.