For the price and its function over Skp900 looks to be the better buy.
mileage is extra bonus, more money & something different. (New story’s)
obd2 scanning is limited but extra bonus on rewriting vin # on donor Ecu.
I have bought 2 of there newest programmer (KeyMaster X300Pro) claim to have the same program as the SKP900. Not true it lacks the newest protcal, all thou the F100 does have the newest protcal.