I'm getting a bike for my mom so she can ride some paved trails with the grandchildren. She just turned 60 so she wants something comfortable. She also had a knee replacement a few years ago, so finding a bike for pain free riding has been a bit of a challenge. She tried a Diamondback Vital 3 and they extended the seat way so she would not have to bend her knee as much as that caused some pain. It worked fairly well with the high seat as high as possible (right before full extension on the bottom) but the pain was still there. I found a 2009 Breezer Freedom Women's Hybrid Comfort Bike for around $300 and a Electra Townie 21D Stepthrough for $479. I would sincerely appreciate any feedback on these bikes or any other suggestions. It's a gift so we want to try to make a good guess w/o a test ride. Either is money back if she does not like it. I would love for my mom to be able to enjoy riding with her grandsons if we can find her the right bike. Thank you very much in advance for your help.