I'm thinking of buying an emoto 1.0 at rei cuz it's affordable, would add to my dividend and has a guarantee backed by rei. I'm a long term bike commuter but I have bad knees (knee surgery only partly successful). So i need some help on hills so as to put off knee replacement but i want some exercise still... I live in boulder, co. No huge hills, no long distance, just going to work and doing errands. Good bike paths/lanes so biking conditions are good. Would welcome your thoughts on emoto or other brands. TIA!!!!