Things I liked: Camera shutter like built in lens protection is brilliant. 9x magnification is a bit fuzzy for 10 to 15 yards, but 3x to 6x is great.
Things I would have changed: just a little too fat in the middle would pay extra for an illuminated reticle
What others should know: A little too fat in the middle to fit the BKL one piece scope mounts. The scope will fit, but when adjusting scope horizontal/vertical to true, it bottoms out (leaving the middle pushed up against the mount and still off kilter). Still love the BKL mounts, but for this scope now I'm using CenterPoint 1-Pc Mount, 1" Rings, High, 3/8" Dovetail, 4 Screws/Cap. Would suggest the CenterPoint one-piece in High (eyeballing the Medium variant, I can see it won't work) or BKL two-piece mounts.
Things I liked: This is about as powerful a piston powered air rifle gets. I bought this intending to use it mostly as a bench rest gun. It's powerful, heavy, and accurate; all good qualities when shooting from a sandbag rest. It kicks hard, but a good rest plus the excellent rubber butt pad help a lot. It's reasonably quiet. Airgunweb did a review of a Hatsan 125 sniper, but with spring piston. Their decibel test put it at 98 db (much quieter than some rifles with *cough* whisper in their names).
Things I would have changed: The bipod is for display purposes only. I never gave the included scope a chance (loving the BSA Stealth Tactical 3-9x40 AO Rifle Scope). The included scope rings are poor. I want to like the sling, it is leather and is very nice... but has poor clips on it. I wouldn't trust those clips to carry this rifle. Hatsan could have hit a home run with sling, but screwed up the clips. (The sling mounts on the rifle itself are awesome though). Four stars out of five because ALL the included extras are ultimately garbage. (Five stars easy for rifle alone).
What others should know: This gun is hard to cock. I knew that going in. I did manage to cock it one handed once, but have since switched to a more secure two handed cocking method. I'm a small guy at 150 lbs, but cocking effort for me is fine (with two hands). The more I shoot it, the easier cocking gets; just spray a little ballistol on the cocking joints as part of maintenance. My gun is in .22 cal and loves JSB Match Diabolo Exact Jumbo Heavy pellets (the 18 grain ones). It doesn't like Crosman premiers.
Things I liked: BKL quality. True one-piece mount, no separate side plate to flip around. Almost everything about this mount is perfect...
Things I would have changed: One star to warn others away. None of my 1" scopes will fit properly due to limited clearance between middle of scope and mount. Yes, this is easily fixed by using some kind of shim, but at this price I shouldn't have to play that game.
What others should know: Until BKL redesigns their one piece mounts to accommodate real-world scopes, I suggest purchasing their two piece mounts only, or looking to a different manufacturer.