I have one each on my Diana 48 and 350 and both have held up fine after thousands of shots. The new Vantage line from Hawke (which will replace the HD line) is supposedly of single tube construction and according to them more robust. Also, while I'm not a huge fan of IR scopes, the Hawke IR's have an etched reticle. Reticle failures on spring guns are common, so this is a worthwhile feature IMO. Now if you are willing to pony up more cash, the Leupolds and Vortex scopes, to name a few, are a step up.
Scotty