Over on his blog, the Veil Guy has a new, and very thorough, review of the Beltronics STi-R Concealed Radar Detector. This is one of the top of the line detectors available, and you will have a hard time finding any reviews of at all, let alone one with the Veil Guy's signature real world testing style. Add to this the unbiased and very honest approach he takes in every review and you will not find a better, more objective look at one of the best high-end radar and laser detectors available.
He is not going to give you some marketing fluff. Instead he installed and documented how it performed, and not over some weekend. He used it for quite a while in everyday driving in addition to just "testing" it. With years of experience and a tremendous amount of knowledge, you will not find many better reviews of radar and laser detectors out there.
While you are there, go and check out the rest of his blog. It is always insightful and a tremendous resource for the first time shopper, radar detector enthusiast, and informed drivers. So go and check it out now!
Great review. Beltronic radar detectors are some of the best one out on the market.