I tripped over this via Google whilst doing some SEO
on my own site.
The display works rather well. Same style as mine, similar brightness. Debatable how useful the head-up feature is in a Civic with the 2-level dash but can be very
handy in other vehicles.
Warning lamps on the head-up display can be useful - if it can talk to your car appropriately.
OBD can be variable - it very much depends on the car how quickly it will let you refresh the data, and the datafeed is rounded to the nearest kph so you do get some funny conversion to mph going on. Covered here if you're interested:
Why doesn't the SpeedView Head up Display use the OBD port?
Not a dealbreaker, and it has the major advantage of being plug and play, but can be a little annoying as a speedo.
Tyre pressures are a disaster though. Those sensors are about 2 cm in size and weigh enough to unbalance your wheel (10g or so). Tyre valves are meant to seal internally, not on the threads, so those replacement caps will leak. That's if they don't get nicked first, or have the batteries go flat.
Tyre temperature is quite a useful tool for setting up a car. You need 3 pyrometers though (inner, middle, outer) and the data logging needs to be fairly live. A single measure of temp/pressure isn't that useful to you - come in from a hot lap and quick check in the pit is just as good.
(I supply a hardwired version of this that shows speed only)