AMike- I hear you. I try to use it as a guide, but in certain situations, I go by PE and I want to know if what I think I'm feeling is true. For the longer races I need to use the HR monitor more so I don't go too fast in the beginning, but I still want to rely on "feel" too.
1 mile run and a perfectly paced 4100yd swim this morning of 300 warm up pull, 3500 straight (hitting the lap button every 700), 300 cool down pull. Splits were as follows:
4:40.40 - 300 warm up pull,
54:13.60 - 3500 straight(10:56.3, 10:53.3, 10:54.7, 10:47.1, 10:42.2),
4:53.20 - 300 cool down pull,
1:03:47.20 - total.
Have a great day!