I have use this line for 20 years now and it is a very good line for those who still like to use mono. The knot strength is amazing (I never had this line break at the knot) and it casts very well off of a spinning reel (I rarely got line twist or memory). I have used the 4, 6 and 8 pound test mainly for smallmouth bass. The only problem is that it does not have a high abrasive resistance, especially around rocks. Check your line often if you fish near rocks.
I have tried about every mono line out there at one time or another over the last 30 yrs, but I always go back to Trilene XL. I am a spinning gear guy, and nothing I have tried competes with TXL. It's limp, casts great, less coil memory, best all around & great value. I try the new ones when they hit the market, but for me XL is the king!
Trilene XL is a great value for the money. I use this smooth casting line for deep diving cranks and also for small jigs when fishing for white bass. It allows me to get to the depths that hold the larger fish.