Never ever heard of an aftermarket kit like this before. Although my friend has one of the new Rav4's that have this feature and it seems pretty cool.

I don't know about you but maybe something likes this achieves the same idea and in my opinion is all around better because I can "see" the car in my blind spot. They attach with really strong double-sided tape and you can find them at any local store

 

^^^ This.

I have a backup camera on my Odyssey and once I used these little mirrors on our jeep, I put a set of these mirrors on my Odyssey. I use the mirrors more than the backup camera now. (The 2009 Odyssey camera is REALLY low quality.)

Give the blind spot mirrors a shot! If they don't work for you, you're only out about $6.00...

 

Consumer reports did a brief review last month. Looks like it worked well, although provided a lot of false positives and has no integration with speed sensors to shut off when cruising at parking lot speeds.

Putting an aftermarket car blind-spot warning system to the test

Pretty cool. Although I like the convex mirrors posted above.

 

I have these spot mirrors on both of my mirrors. They are awesome, I can change lanes without even looking back, just look into these mirrors. They are like $3 at Checker or OReilly auto parts. Sorry for the night picture.

 

My F350 has these mirrors and they are great. I wish Chrysler would take the existing Jeep mirror and place the lower convex mirror, as shown above, on the bottom of the existing mirror. It would look clean, offer greater visibility, and cost very little.

 

Yeah, I've got the little convex mirror, and it works pretty well. I had a blind spot system in my old car and my wife wanted to know if I could get it in the Jeep. I did a search and found this Goshers system. It seems like an easy install in a Jeep. Not too helpful on the trails, but could be nice for the daily driver!

 

I found about a year or so ago that I've been adjusting my door mirrors the wrong way for all the time I've been driving. Once I adjusted them properly, I no longer have a blind spot (well, more precisely, I have a blind spot but it is in a spot relative to the Jeep that isn't dangerous). This talks about it: How To: Adjust Your Mirrors to Avoid Blind Spots - Feature - Car and Driver, but here is the process I actually use:

1.) Driver side - sit in normal driving position and then lean my head all the way to the left until my temple is touching the driver side door glass. Then adjust driver mirror horizontally to just barely show the side of the Jeep and vertically so the horizon is centered in my view.
2.) Passenger side - sit in normal driving position and then lean by body to the right until I am as close to the centerline of the Jeep as I reasonably can be. Then adjust driver mirror horizontally to just barely show the side of the Jeep and vertically so the horizon is centered in my view.
3.) switch power mirror control to neutral position so it doesn't get bumped.

Now, as mentioned in the article, this is a very different view of the road out the mirrors compared to what it used to be, but I find that on the sides without turning my head at all, the 'blind spot' is now roughly the size of a Smart car (i.e. any bigger and I will see at least part of the other vehicle in either peripheral vision or mirror). There is also technically a blind spot far, far behind, but it's far enough behind that it's really not a problem.

The way I used to adjust mirrors (and as far as I know, everyone else seems to do this, as every time I get in another vehicle, they seem adjusted this way) - sit normal and then adjust both mirrors so the edge of your own vehicle is just barely in view on the edge of the mirror. Never again for me!

 

Not sure how well those would work. Those look to be ultrasonic sensors (like you see for distance-sensing back-up systems and Ford's self parking systems. Most OEM Blind Spot and Cross Path is radar based.