Personally I am surprised Tekin is still as popular as it is and I can only imagine the reason for this is the large amount of support from it at most tracks where as anything else generally has much smaller numbers and less "fast" settings from fellow drivers. I have driven various other peoples car with various speedo's and motors and some have gone surprisingly well but to me the Tekins have always had some big misses against the competition, they lack bottom end and they have funny brakes. On tracks with good to high grip Tekins work well but I have never seen proof that they are faster in any way than any other decent speedo except for on 5% of the average track.

H/W on the other hand seems to be a little less reliable however if you spend the extra and get a SP version these seem to have less problems (don't know why). The ones I have driven are a reasonable challenge to the throttle feel of the BD with good brakes and lower motor temps than the Tekin. They seem to have a lower potential as many use settings very close to maximum however they get results on the track.