As always, Lamson reels and spools are top quality. I have been fishing a pair of velocity V3 reels and spools for 13 years and they are still hauling in big fish today. The Guru Series II 3.5 spool and reel are no exception. The price is also very nice when compared with our top reels. The only thing that might be better than Lamsons reels is their customer service.
I have this reel in a 3, 3.5 and recently added a 4 because of how happy I've been with the 3 & 3.5. I mostly use it for freshwater (large trout, steelhead, and bass) but have also used it in the salt for inshore fishing for Dorado and Roosterfish, where it worked admirably. The Roosters really tested the drag and was so happy with it that I've added the 4 to pair with a 10wt I recently received. Sadly, this model has been discontinued so I've been hunting for spools.