I owned a TNT 115 for awhile years ago. I was pleasantly surprised by the full-range, punchy tone and the crispness & clarity. No mud there. It's sort of what I imagine the GK Neo 115-III cab sounds like.
At only 100 watts RMS (as I recall), it's unrealistic to expect it to cover high volume requirements in large rooms. It's a club amp. So long as you use it for its intended purpose, and keep any unrealistic expectations in check, you'll be good to go. For the very reasonable price, you could do a lot worse.