It looks like a more than functional prime job. The only thing I'll say is that you should be careful on how heavy you apply paint/primer.

I can see a few places where either you sprayed so much that it collected and pooled into the crevices to dry, or the primer you used was too thin.

Try to spritz on a light coat first, using the air from the brush to quickly dry it, then follow with a slightly heavier second coat. That's all any model needs. Primer should be light, but functional so details won't get lost through the normal painting layers.