About dozens, they might be catering to some particular few or might not be working at all. About ODIn, I can assure its been working without problems through decades, but it comes at a cost that's why all traditional brokers have it and they have no intention to re invent the wheel.
Nest - free things comes with downside, every discount broker have it so no rocket science in that, apart from Nest and Odin we dont have choice.
If you have better option I'll be more then willing to change, but for execution so far I'll go with time and tested one.