For years I use to play with a Marshall cabinet with 2 G12T-75. I spend loads of money on pedals and pickups and while I still enjoy each of those purchases the biggest impact has been this speaker.
The clean sound is so much better, smooth is the best word to use. Also with overdrive the speaker is so much well defined. There is more clarity compared to the G12 and I am cutting better through the mix. Our usual sound engineer loves this speaker. Without me telling I bought this he straight away asked how did I improve my sound so much.
I got a small open cabinet that suits this speaker just fine. Have not tried this with a closed back.
At first the speaker was a bit bright but after adjusting my setup things improved for the better. Compared to other speakers I tried the gold makes them sound "bland".
I now have this speaker in use for over a year, so I am not writing this in the honeymoon period. It is reliable, has a great tone and this one speaker has replaced my 2x12 Cabinet so it also is better for my back!
I highly recommend this speaker if you play rock, blues or funk. It is not cheap but worth every penny! 5 stars