I have had a Pulsar Quantum HD50 for some time now.
It has transformed my shooting, as I now use the thermal 80% of the time and the bino's only to back up what I think I see.
The success rate, in particular on Muntjac, has more than doubled.
But be aware some more traditionalist stalkers consider it 'unsporty' (More unsporty than a rifle/scope/bino?
)
Be aware of UK retailers asking for to much money for these units, you can get them 20-25% cheaper if you buy online in the Eurozone.
I recommend you do not accept the quoted UK retail price and negotiate it down and/or ask for free extra's such as a long-life battery and video unit and neck-strap, OR take your business elsewhere.
Also, for the price, I think they are badly engineered, for example they are not waterproof, and have a clumsy battery cartridge which won't last long.
The mounting points for the straps double up as mounting points for the (extra) long-life battery and video unit, so you can use either, not all, at the same time.
And with every laptop, mobile and tablet now equipped with a SD slot, why oh why is a photo/video recording facility not builtin to this unit forcing you to pay some £100 extra if you want that facility..