Previous posts will show it was something of a key topic for us. Whilst always generates interest - which is good in of itself, that interest seems to peter out fairly swiftly and has little affect of swaying opinion - ie those keen enough do it anyway and threads dont seem to do a lot to encourage others.
In terms of commercial packs. The market - like many other products - is a minefield with the good, the bad and the ugly being marketed for the nice, the ok and the eye-watering ( prices ) with no clear correlation between the two!
We carried and tried to develop stalker packs - but commercially just didnt work. The interest didnt translate into purchase. Or if it did, the message was lost and a £4.99 Tesco jobby was the popular choice.
The position isnt helped for those looking to make a choice as opposed to 'enthusiasts' in that there is a wealth of conflicting information and opinion out there. Often good advice is actually skewed by being given in the wrong context.
We still do various items and Celox goes reasonably well on courses. But pack expiry dates just dont make it viable for us to openly stock online. We still do specific packs to order for Estates, professionals and the like - but fairly often even that only comes in fits and starts.
I think Bog Trotter did a post to a thread way back with the most likely injuries you will face - and gunshot wound is waaaaaaaaaay down it!
In terms of guidance, there's a lot of inadequate tat out there. If comfortable assembling a kit for your needs, then strongly recommend shopping with the likes of St John Ambulance ( good prices and for a great cause ) or SP Services - they simply wont be carrying rubbish stuff.
And always remember kit is great, but you must know what to do with it!