As mentioned on another thread, i didn't really get on with the OP1. I didn't get the tape and I found many the synths rather "thin".
My brain works well with grids! So the sequencing on circuit is a breeze. The synths sound fantastic, and with the izotonik editor it's really simple to create own patches. Sample import is easy through the circuit components website, but requires Facebook or Google login - not ideal for some, but i don't really have a problem with it.
I like having option to write ideas within set scales or have a chromatic keyboard when required.
All in all i have been waaay more productive in the last week that. In many many months with the op1.