I have the Brakeaway too and Like hanse am very happy with it. Took Malcy and I about an hour of stuffing around and fine tuning in between drinks but it all paid off. Once it is dialled in works like a charm.
Obviously no mechanical cruise is going to work as well as electric so mine will be up for grabs when i install the MCC but after fitting the Brakeaway i dropped the MCC to the bottom of my priority list.