Just got my new SparX S-07 helmet this past Thursday and figured I would give you guys and update.
First of all, this helmet is an AWESOME deal. It is $109.99 MSRP, DOT and ECE-2205 certified, and weighs only 3lbs 5.3oz (for comparisons sake, a shoei X-Eleven weighs 3lbs 7.2oz)
The helmet is pretty good quality. The liner is just as soft as my Shark RSI helmet and absorbs sweat very good. It is also less noisy in most conditions, which was surprising. It vents pretty well, and even has visor vents similar to the higher end Arai helmets. I also noticed no buffetting, even at high speeds.
5-Year Replacement Plan. If you damage your helmet in a crash, all you need to do is send SparX a copy of the police report, short summary on how the helmet performed, and the damaged helmet and they will send you a replacement helmet.
For some reason, the helmet is quite loud when in a full tuck. Much louder than normal riding. I had a similar issue with my old Scorpion Exo-700, but no such occurrence with the Shark RSI. Would not be a problem for street riding or for riders wearing ear plugs (SparX actually supplies a set).
The biggest issue i have with the helmet is the visor area. I don't like the visor installation/removal system. It is not hard by any means, but it isn't great. It is similar in design to the Shoei RF-1000, but not as easy to operate. I am hopeful that it becomes a bit easier once it is used more.
Now to my biggest annoyance:
The visor does not close all of the way by just pulling down on the tab on the front. The side with the tab closes while the right side stays open (if just barely). This is solved by closing the visor from the middle area (with a bit of force) instead of the tab, but it is still annoying.
If you are looking for an affordable, lightweight, comfortable helmet with and extremely good warranty then you should try out the SparX S-07. Visor issues aside, I am very happy with it.