I have the 21 and the 25. It's probably better that you didn't get the 25 because they have recalled some of the parts on the 25. The back wheels and tranny. We had a few issues with the tranny slipping on the 25, but we mow a very steep slope a little over 200 ft long with it weekly. It has had no problems with the new tranny. Ybravo said they had problems with the back wheels coming apart. We didn't have that happen. The 21 has been rock solid with no problems.