Hi Les, welcome aboard!
The Cyclotricity is a good example of an entry level kit. The motor is very quiet and surprisingly powerful. I would however recommend you opt for the 9ah bottle battery, the 7ah seatpost battery sometimes gets a bit nervous of the 15 amps demand of the motor. I would therefore suggest choosing a host machine with bottle cage fixing points. There have been problems with disc brake versions due to disc rotor misalignment with existing calipers, so a host bike with V brakes would be the least problematic during installation of the kit.
Hope this helps
Regards
Bob