This cabinet is fantastic in terms of its portability, and is great value. If you have bought the Orange Micro Terror Head, it's probably worth buying this just to have a really handy cab to grab-and-go for small gigs.
However, I would suggest changing the speaker if you want to get the best out of it. I swapped it out for a Celestion Eight 15, which was a fairly cheap upgrade but made all the difference. The stock speaker sounds quite small and boxy, but with a modest upgrade this cab can have the sound that its build quality deserves.
To summarise, this is a well built, solid and attractive cabinet, but, for me at least, the sound of the stock speaker just didn't quite meet my requirements. With a speaker upgrade though, this can become a really handy cabinet for small gigs.