the ps3jigs success in getting a ps3 into fsm is very sporadic. some people get it working. others try for weeks and get nowhere. i tried with 3 different psps and had no success. (i dont own a pspGo but a lot have success with these.) i'd highly recommend e3, its saved my ps3 twice now (bleeping death - semi-brick) although pretty much any dongle does the same job, so whichever is cheapest would do the same.
PSPjig is an excellent idea, i only wish it worked more reliably. i'm not even sure if hes still working on it, maybe someone else should have a play around with the idea and make a better one.
All i can say is if your relying on this to save your ps3 DONT get a dongle , any dongle. but remember, you cant get out of FSM above 3.55 anyway so unless this changes soon. there will be not much use for either this or a dongle.
they're pretty useless for anything other than a FSM tool, but for £15 to £20 thats still a useful tool to own.