I buy the lt designer keyboard back in 1998 , and have use it daily since . well , after 12 year the shift key stop work and it be finally time to replace it . Technically these keyboard have a lifetime warranty , but give that I have go through at least 3 monitor , 4 computer , and who how many mouse in that time -lrb- not to mention a few liquid spill or other abuse -rrb- I think it have prove its worth many time over . but in addition to reliability , it be also one of the most comfortable keyboard I have use . the key have the perfect weight -lrb- and different weight depend on they position -rrb- and spring , and none of that annoying IBM keyboard clack noise . it be a large keyboard , but the extra space mean the function key , number pad , etc be not cramp like on some compact keyboard , and allow a subtle concave ergonomic slope as well . my only complaint might be that it be PS\/2 ; still , it do a great job of capture simultaneous key , make it ideal for game as well as work . all in all I can not recommend it highly enough , which be why I just buy a new one to replace it !