A couple of days ago I came across a guy I often see riding a Workman adult trike with a trailer and a shade cover. He rides it to take his dog for a walk in my neighboirhood. This time I stopped to talk to him. It is not a one dog powered assist trike but he has e-assist on the front wheel. He told me that were it not for the e-assist he would have a difficult time pedaling it up a hill because the trike without all of the accessories weighs around 75 pounds. I wouldn't recommend it for anyone recovering from surgery due to the weight alone. Of course, the Catrike 700 at half the weight of the Workman might be a very poor choice for anyone with limited mobility. I know because I ride one. The better recumbent trikes with higher seating like the Catrike Villager are not cheap. The cheapest entry level trikes are heavy and have very limited gear ranges. It is often a good idea until the price comes up.