There's no haloing with my ALP-T as well. It's a very good filter with good transmission on both bands.
My main rig is full 7 filter Antlia setup and I am quite happy with it too. Their current 3nm filters are outstanding value IMO. Grab em before they go the Chroma route with pricing
Because of pricing i bought different brands filters, which is one Antlia Ha 3nm 2" and second Optolong SII 3nm 2", both were cheap enough, Optolong had an offer last month which i couldn't pass so that i bought SII, now i only need to buy a dual band NB filter i prefer 3nm so i can have full data, i neglected to buy any cheap OIII 3nm filter yet as i want to use a dual band filter first, if it is great with OIII part then i won't buy an individual OIII filter, if i buy a third APS-C mono camera in future then i will buy OIII filter, and good there are many options out there for that.