Clearly it has fixed spreads. Ill give you an example of what I mean by ''larger spreads.''
Say the market is on an uptrend, and goes down 15 pips before heading for a higher high. So, went up to 1.1950 and down to .1935 then up to 1980....
Well, as I experienced, very often FxSols feed will only go to .1937 or .1936, or sometimes .1935 but for half a second only (while on other feeds it stays at .1935) therefore not allowing you to buy at a certain price.
Now, this seems like a negligeable detail, but if you think about it... these manipulated feeds often end up having the same effect as if the spread was 4, 5 even 6 pips instead of 3. Think of the above example and multiply everytime you try to get a specific price to enter....
Now, of course this does not affect much if your targets are 30 pips or above, but when you go for 5 pips or 15... its makes a big difference.
Another example, and this affects your Stop losses. I HAVE experienced this, unfortunately.
say your selling GBP at .7400 and you SL is at 7435. Well believe it or not, FXsol does hunt for SLosses like many others. I always run 4 different feeds to avoid these problems, so this is clearly confirmed.. A small spike could happen from .7432 price goes instantaneously to .7435, takes out your position, and this while on the other feeds PRICE doesnt even go higher than .7433....
I hope this answers your questions.