We never used a walker and our daughter started walking at 11 months. She had a jumperoo and loved it. We never had a problem but had heard all the bad things about walkers so we did not bother. Also, they did not even have walkers when my husband and I were babies and we managed. Our pedetrician said babies using their muscles for crawling, pushing, pulling up etc.. is very healthy, natural and helps their development - though this is more time consuming for you as they must be monitored more frequently.
Our daughter is now 13 and in great shape. Her pedetrician was an older doctor and very current and flexible with the latest and greatest, but believed that somethings can't be replaced - like exercise.
Good luck,
T.