Yes it's a quality gun.
The only real difference in QUALITY between the Express and more expensive Wingmaster and Police guns, is the Express isn't as well polished internally, and has a rougher black finish externally.
The Express is simply a way for Remington to lower prices on their guns to compete with the cheaper guns made by Mossberg and Winchester.
The way they did that is by saving money on the blue job, the plastic trigger guard, and the finishing of the internals. Other than that, it's built the same way as the more expensive guns.
There are differences in the materials used, and the features of the different guns, but the Express will last you as well as any other Remington. Which is to say, the rest of your life.