The Leshiy is one of those guns that you fall in love with as soon as you hold it in your hands. Extremely well-made and a lot of fun to shoot. Like @JadedC said, the POI doesn't shift and that means a lot. I bought mine out of curiosity, not because I needed another airgun. Now I take it everywhere. Whether I'm planning to shoot or not, I throw it in with my essentials on every trip. Even with the long barrel, it fits into any backpack and is light enough that I don't notice it.
Mine is a .25 and it groups consistently at 50 yards. Let me rephrase that... I get consistent groups with it at 50 yards. The reason I say that is because this rifle is capable of more, but that is where the light weight works against me. You can use a Leshiy for longer range in the same way you can go backpacking with a benchrest rifle, it can get the job done but you have to put in more effort.
I love that it is single-shot. It is a forcing mechanism that makes me slow down and pay more attention to what I'm doing. I think single-shot aligns perfectly with the design of this rifle. It reminds me that perfection is when there is nothing left to remove.
My advice is to avoid the .30 due to low shot count and because the Leshiy is less fun to shoot (jarring) with higher hammer spring tension. The .25 gives you 15 relatively flat shots and hits pretty hard at 760 fps. Whichever way you go, I look forward to hearing your opinion on it!
Kevin.