i've tried the new atk305. didn't like it. the tone was muffled and the bass felt too light and flimsy. played unplugged, it didn't have much clarity. just a very muddy thud. plugged in, it was the same but i found the electronics gave me nice flexibility in adjusting the muddy thud.
i've deduced the bad tone to the elixir strings. so to me, the new atk basses are lighter versions of the old atk series with potential to sound almost as good if the strings are changed.