I love to sweat, I say it is absolutely worth it. if worth = casual stress free, ped free, (or low cost), way of earning skills.
If worth = making ped then hell no its not worth it..I have 200k sweat to sell to prove its not worth it
now I admit I have turned down offers of up to 2.5 ped for the lot which by today's market is probably a very nice fair offer. However I wont sell less than 3 just my personal goal (used to sell for 5-6 as fast as I could get it). things are dynamic I still hope to wake up one day and find sweat skill Nerf and sweat worth 10 ped per K..then I will sell at 8-9 and be very happy
Will it happen, nah never..good thing I sweat for the skills.
Evade/concentration/combat reflexes etc.
Absolute best thing about sweating? window mode +alt tab. = I can sweat and do other things, allows me to play EU when id otherwise have to log out. I swunt hunt and craft as well, but sweated about a year before doing anything else.
I have been at it a couple of years and have prof lvl 23 sg. mostly solo sweating/swunting but some nees like groups especially when I need to /tr
so in short yeah its worth it if yoru doing it for the right reasons, and no its not if your not...like anything else in life