I have worked on thousands of rifles over the past few years, but if someone asked me to repair an S16 or a Stealth I would turn the job down, they are the biggest waste of metal in the air rifle world! You could spend a fortune of your time and money on one and still beat it hands down with an off the shelf Bsa ultra or Air Arms S400.
You could tell us how good you think they are till the cows come home but you wont change anyone's opinion if they have already had any experience of them.
If you are set on getting one ignore all the above advice and go ahead and buy one. I imagine the only people who will say they are good are the ones trying to sell one!
HFT, for people with only 2 buttucks!
VooDoo TwoTwo The next chapter.