Only the loader issue for me (the performance of which seemed to be improving the more I used the gun).
Other than that, the fad of a full auto BB gun has worn off pretty quick for me. Shot it a few of times in my back yard, let my airgun buddies shoot it, then put it away in the garage.
I guess that with airguns I'm looking more for accuracy & precision, and less for just putting 'lead' down range.
Since I don't hunt (anything more than ground squirrels), the novelty of semi-auto pellet rifles kind of wore off to me as well. Had multiple Hubens at one time and don't have them any more. I can see where some may love the full and semi-auto pellet & BB guns - maybe those who have come up through, or have more familiarity with air soft? Its just not me.