HHTT Short list of pros and cons:

PROs

no bells and whistles
very low fees when mining with difficulty higher than 128 and at difficulty 128 (default one) fees are slightly less than 0.51%
half of each block's transactions fees are paid to the miner that finds the block lowering fees even more
rock solid and resilient
no registration needed: bitcoin address as username and whatever you like as password.
if you want to set your difficulty just add it at the end of your username preceeded by an underscore:

1FDkoGo8o9tmXD4cYpAqBZeWACJiYjMm3x_256

This sets you at difficulty 256.
TOR mining aka don't let your government know that you're mining...

CONs

no bells and whistles
backgound colors can be annoying at times - just reload page for a different combination
with difficulty growing so fast variance can be felt at times

NEWS

October 22nd, 2013: easy configuration sample for high availability for cgminer (should work with bfgminer as well)
October 24th, 2013: as en example of block's fees reducing pool's fee, see here latest block which paid a good 0.15 BTC to the miner who solved it: https://blockchain.info/block-index/429263/00000000000000072089a0adae2b921c93f3d707c1180b7dae1b63ef03e0dd78
November 8th, 2013: there was no mention of pool's URL... now there are at least two links to it
November 9th, 2013: no other pool gives you a 9.5 BTCs prize for a solved block!!

This is a Pay Per Last N Shares pool which means that you need to mine here for at least a couple of days before getting your full share of each found block.

Oh, don't forget to have a look at the original thread if you want to know how it all began.

spiccioli