The reason why heavy users prefer this type of elliptical cross trainers is because fixed models provide more stability. These kind of elliptical cross trainers resemble the models you see at the gym, and they are usually built for a semi-commercial and commercial use. Although there are models built for light home use, these are usually the low range elliptical cross trainers.
If you want to take your training seriously consider buying a fixed elliptical cross trainer at FitnessInn. After all, it’s what professionals use.