Have not received yet.

Very cost competitive. Arrived quickly,..... accepting the Christmas delay. The product had a lengthy expiry date, not that it was relevant in my case, as it was for immediate use. Instructions on the packet are miniscule, so you'll need decent eye sight. Instructions in larger print would be helpful.
John 'beeman' Saunders has produced a useful Youtube video on Apibioxal trickle treatment.

Api-Bioxal is part of my IPM and it seems to be effective.

I find this the easiest way to treat varroa .I use a cheap vaporiser all takes 5 minutes

Transaction was fine but slightly more expensive than other sites for same item.