My new Getzen trombone (a Christmas gift to myself) arrived a week ago and I've now had a chance to run it through scales, exercises, tunes, etc. It is a student small bore model, but is worlds apart from the rental I've been playing the last 9 weeks (a student Eastman). The slide moves as if it were lined with teflon. My tone is now consistent through my playable 2 1/2 octave (3 - if I push it) range. The mouthpiece that came with it is a Getzen 12C, but the cup looks and feels like a Denis Wick. (I play DWs on cornet and flugelhorn and I have a DW 12CS on order.) Notes slot much better throughout the range. I like the overall smooth light tone I get with it, but if I want I can push it and get that big fat trombone sound. I will be playing mostly jazz and ballads in a Big Band style.
I was unable to try before I bought, so I took a chance and was relying on my experience with my custom Getzen cornet, which is a very nice pro BBB instrument. I didn't like the student level King/Yamaha/Bachs that the local music store had in stock and I don't have the money to buy a pro horn - even used. (The local "used" market is very slim.) But I think I made a good choice. I'm very happy with it so far, and if it performs anything like my cornet I probably won't trade up to a pro horn for a long time, if ever (considering my age and how many playing years I have left).
I'm on my way to having a really good, fun time!