I have the Hagerman Trumpet as well. I have a feeling you read the Mikey Fremer review. To be honest, I think Mikey botched that review. Seems he really didn’t take it too seriously.
Is it too ‘tubey’? Perhaps, with the stock Mullards installed. But still sounds good. I first replaced the 12ax7 Mullards with new Genalex Gold Lion gold pins, and that leaned things out and provided better detail overall…..then found some NOS Dynaco branded Telefunken smooth plates, and they improved the Gold Lions by a fair degree with more smoothness and refinement.
Nice thing about a tube pre, you can change the sonics per your desire.
The Hagerman Trumpet MC is a steal IMO.