From what it looks like (Xilinx parts primarily) if I bought one of these boards I'd be stuck using either Altera or Xilinx tools. I think some spartan 7s work with yosys/nxtpnr, but not sure how well.
Ummm... no, that has not been my experience at all. I'd replace 'good' with 'buggy' in that sentence. And also very, very bloated - like 90GB bloated. I've had good experiences using yosys/nxtpnr/SymbiFlow, but that's kind of limited to the Lattice ICE40, ECP5 families and Quicklogic.
