My brother got the Maverick Rev-6 for christmas and I was really impressed by it, and it inspired me to look for a Nerf gun of my own so I could join in on the fun. Now, it has to be said, that the out-of-the-box range on this gun is not terribly impressive (it's about 5-6 metres, not quite the claimed "35 feet"), so for me the modifications were almost a necessity. Non of them are particularly complicated, and I found the whole process to be really fun. I have also enjoyed painting it, which has added some real flare to the gun, and is the most creative thing i've done in ages.
To summarise: For a slightly younger person, this toy is extremely fun and easy to use, durable, and safe. For a slightly older person, this toy provides a lot of creative inspiration and genuine satisfaction.