No. I don't find that my guitars lose character on these little modeling amps. For the simplicity of plug and play I still say the Line 6's are great. As mentioned they are durable and reliable in the experiences I've had using them. I've never had a problem with either of mine. As far as guitars played through them : the LP sounds different from the Tele that sounds different from the Firebird that sounds different from the PRS . Each guitar retains it's own indiviual character when played through these little amps. I wouldn't use the smaller (75w and down) modeling SS amps in a giging situation, but in an informal setting, they are easy to use and sound great a low to medium volumes. My opinion. I can sit down after a long day of Grand Pappying, turn on the SpiderJam and have dozens of sounds available at my fingertips, or by using the FVB Express pedal. There are so many preset tones (some good, some bad and some friggin ugly) that I haven't even tried half of them yet. You can now change the key and tempo, seperately on the pre recorded jam loops! That's great! You can change a song from C# to Am, or E and not change the tempo. You can change the tempo from 120 BPM to 200 BPM and it dosen't sound like the Chipmunks. I wouldn't hesitate to recommend the Line 6 modeling amps to anyone.