I purchased the synergy about 2 months ago. I have been spraying pre-m in a low volume as well as weed control. I can spread at the same time. basically its a perma green thats not self-propelled. I am able to get 14,000 sq. ft. with it. Its great for small and medium sized lawns. Its fast and effective. Its easy to use and so far proving to be durable. They run $350.00. A great buy!