ive got the cheaper ride on for 3 bikes was just over £110 all in with £10 of that a new plate from the motor factor
its still going strong after about 6 seasons use and i wouldnt go for a roof mounted rack again
makes next to no difference to mpg and yes the bikes get a little dirty but you'd be washing them when you get home anyway so no loss
security, just lock a cable through the eye on the towbar and into the frames and did i say that its rock solid with 3 bikes at ahem national speed limits 🙂
well worth the investment and into the bargain ive even towed the clubs bike trailer so it came in quite hand to have a tow bar fitted, also means if i need to go to the dump or garden centre or to get wood i can borrow a neighbours ifor williams trailer too ,,,saves the inside of the car getting messy
edit re above comments on the wheel trays ..would agreed with 2.35's it can be a bit hit and miss but at the time i didnt want to pay £250+ just for a rack
i got my rack and towbar fitted for way less than that !!!