The Worx WG 170.2 trimmer was bought to replace the batteries for a 9 yr old worx Wg 151 trimmer . The batteries alone were quite costly so for an additional $20 i was able to buy two new 20 volt batteries, charger, and a new WG 170 trimmer. Both trimmers use the same batteries, line, spools, spool covers, and chargers. I will say the new WG 170 gets used once or twice a week as an edger for my 60 ft. Long sidewalk and 30 ft long driveway as well as an edger for the side of my house and landscaping. The WG 170.2 came with two each 20 volt 2.0 ah batteries that i alternate however i rarely need more than one battery for my trimming. The things that i like about this trimmer. It is lightweight, the adjustability of the handle and trimmer head, the push button line advance, the easy spool changeout, the wheels for rolling on the sidewalk while edging, and the ability to interchange or run various other tools with the same batteries. I have a Worx 20 volt hedge trimmer that uses the same batteries. The things that could be improved on. The wheels could be larger, would roll over joints or cracks in the cement sidewalk and debris and clippings better. The metal guard that slides out of the front . This guard is adjustable and would be usefull for both horizontal and vertical trimming if it locked in place. I found because it doesn’t lock it does not function as an edge guard very well and a feature not designed very well. I use the trimmer vertically to establish a nice straight edge to my landscaping and the edge of grass along the side of my house. Because the edge guard does not lock in position it is useless to use the guard as a sled runner to slide the trimmer along the grass vertically. The wheels do not roll in the grass either ! The trimmer guide locking in place would let the trimmer slide through the grass . Instead of sliding the trimmer through the grass i find it easier to bump trim or plunge trim . Works quite well if you watch the cutting action of the string . I also own an Echo gas edger that i seldom use because it throws so much mulch and dirt that it makes cleanup take alot longer . This Worx WG170.2 is a medium duty trimmer that is lightweight, easy to use, and takes little space when collapsed and folded up for storage. The two best features i find very useful on this trimmer that set it apart from lots of others in it's class is the string advance lever in the handle and the wheels that roll on the sidewalk that makes for very uniform depth and straight lines when edging.......... the pics show both trimmers retracted, both trimmers fully extended, both trimmer edge guards that do not stay in place, and both Worx trimmers and my Worx hedge trimmer stored on wall. UPDATE 4/28/2022. The trimmer secret to edging landscaping with this trimmer is to hold it in a near vertical handle position and drag the trimmer thru the grass rather than pushing the trimmer as you would do if you were rolling the wheels while edging a sidewalk. You can maintain nice straight edges by grasping the trimmer with the left hand on the adjustable handle and holding it in a secure position while simply walking with the edger. Like dragging a stick on the ground rather than pushing a stick on the ground. The dragging method with you left hand knuckles facing down is a lot smoother action. You may find it helpful to adjust the length of the trimmer shaft a bit shorter so your arms are not held as high as you use the drag and walk method for landscape edging.