I use a Road Angel in my Lexus without problem. I have the 9000 model which also has navigation or just camera mode and also has auto update, as my other car, a Volvo C30, doesnt have Sat Nav. Interestingly, it sometimes takes quite a long time in the Volvo to pick up a signal.
I beleive the Road Angel has the most up to date camera database and because of the auto updates you dont have to worry about pluggting into your PC.
Finally the heated elements at the base of the screen should cause no problem at all, as far as I'm aware only cars with UV reflecting glass have a problem, which I dont beleive Lexus use. The only issue with the Road Angel is that at times it can be a little tempremental and if driving through an area with possible multiple hazards in the same location the unit can go into information overload with a barrage of warning repeated over and over again.
Regards
Keith
Cheers Keith. That certainly helps with my concerns about an external antenna etc. And thanks to everyone for their suggestions and input so far.
Anyway, the plot thickens. I phoned Road Angel today hoping they might convince me whether to buy or not.
To put every one a bit more in the picture regarding my location in the Far, Far North my nearest Gatso is about 150 miles South of me (Yeah the joys of living in the sticks). The downside to this, is that my sworn enemy is the Mobile Laser b**t*rds!
Now, Road Angel reckon that I should go for the slightly cheaper by £35, Road Angel Professional Connected without the Laser detector, or, the even more slightly cheaper by another £45, Road Angel Professional which is not connected via a SIM and no Laser detector.
Confused? So was I, but here's the sting."You should have one of these as well":
http://www.road-angel.co.uk/laser_star.asp
Now if I didn't travel deep South to Central Scotland quite frequently, I might have had one of these and not bother with the Camera detector at all.