I must say choosing this simple flash was no mistake at all, it might not have all the fancy features, but it works great. As far as how long it will last that is something I will have fun finding out. I only have it about an hour and have taken only a few pictures of subject matter around the house. All the photos were taken either in bounce position or direct just to see the contrast.
As you can see this lamp is very well and evenly exposed.
Direct flash:
As you can also see this is not as evenly exposed and the wall is washed out.