Is it ok if lines look like this?

[u3040]

On purchased HUION 680TF and now curious if it's ok if I'm getting lines like this if draw them varying pressure.
Top lines - if try to change pressure quickly.
Lower lines - if try to change pressure very-very gently (after some training).
Does it look the same on budget Wacom tablets, like Wacom One by Wacom Medium?