Large gardens with lots of grass often take a long time to mow and a self-propelled 4-wheel rotary lawnmower is a very wise buy in these situations. Available in working widths up to 55cm, these machines are often large and quite heavy; therefore a self-drive system is a necessary feature, particularly if your property contains undulations and slopes. Even if you do not have the largest area to cut, a small lawnmower with a drive-system is very easy to use and will often provide you with more consistent mowing results compared to a push-along machine, due to the constant speed it maintains. Self-propelled rotary lawnmowers do cost a little more than non-driven mowers so a little thought is needed as to whether the extra expense is worthwhile.