Bought the 3x5 because my fiancГ© is starting more advanced math and it makes examples easier. Decided on the DuraMax because I don't ever want to buy another board because of "ghosting."
I installed it myself. Two people may or may not have made it easier. Installation was straight forward: Measure wall, mark and install anchors... hang board (center on wall), find studs and mark bottom of frame... remove board from wall and pre drill holes for lower frame support ... rehang with marker tray, tighten screws done!
Only complaint was the metal wall anchors provided. I opted for plastic anchors I had in the garage because the fine thread machine screws (super cheap) stripped when advancing into the metal anchors. They probably stripped because when the anchor was pushed through the drywall the rounded anchor body that flares and grabs the wall was compressed (bent) such that it was now convex instead of concave (this would cause the metal to buckle inward toward the screw instead of outward toward the wall). I probably could have been super careful when advancing the anchor through the drywall holes, but once the second anchor stripped on me I figured why waste any more time.
I had no idea how often we'd use the board for our son (7 year old) and am still very happy with the purchase. The black metal frame had a small dent on its face when it came out of the box, but once the board was hung it was not noticeable because of the flat black finish. We'll always wonder if the mahogany frame would have matched our furniture, but thought it was too big a risk because we were buying online.
I bought my board through an authorized online vendor at a great price. The price was the lowest I could find with shipping and was apprehensive of whether or not I'd be able to register for the warranty. Fortunately, Quartet has a list of authorized vendors on their web page to reassure you the price and vendor are legit.