I have posted before about LMAX along with my view that this could be an excellent exchange if they got their act together and provided their users with a proper interface which took advantage of the USP.
Anyhow, it seems some of their management has changed and even though they still have their very own crap port, they are also available on Fastbroker's Pathfinder multiplatform software. This has a beautiful DOM interface which I adore and if they dont currently have many programmers producing goodies with their API, for all you coders out there, you have a fantastic chance to get in on a pretty broad open market if you would like to.
The caveat however is that, although they supply you with the usage of Pathfinder for free, the commission of $3.09 per contract each end means the advantages are blown from the window from the high cost.
Due to the simplicity of setting trades, things like spreads are basically meaningless (but if you would like to exchange at market all the time, the spreads are likely lower than anywhere) but the $6.18 round trip per contract is, in my estimation, a high price to pay.
Why on earth Betfair didnt only open their equivalent for FX, stocks and commodities and give an interface like Gruss or BetAngel, and take 5% comm, I will never know. Sounds to me some people just can't see the wood for the trees.