I had an old AGS branded one (without IR), which was a great scope. They were also popular for NV add-ons IIRC.
Having used a few of the modern 'EZ-Tap' versions, IMHO the glass is nowhere near as good as the old ones. The term 'looking into a goldfish bowl' springs to mind... but I guess buying from Amazon etc - you can try it and send it back if its rubbish?
In my view, it wants to be a good scope for 150 quid.