Sometimes the site bogs down a bit for me, but generally it's fine. If you don't already use it, get Firefox and lose internet explorer.
For those of you who use firefox, here's a couple tweaks you can make that should make everything faster.
First in the address bar, type in "about:config" without the quotes. It'll ask you if you're sure and these are for advanced users only, continue.
Scroll down until you find "network.http.pipelining". Set the boolean value to 1 (true)
Then find "network.http.proxy.pipelining". Set it's value to 1 (true).
Now find "network.http.pipelining.maxrequests". Pick some number, say 10. This enables firefox to put 10 seperate requests for the page in at once, and in theory load it 10 times faster. While that doesn't really happen, it usually does speed things up considerably. Setting it to a stupid high number (like 100) can sometimes screw up lower capactiy websites, and it won't really give you any extra speed.
Right-click anywhere and pick "new....integer". Name it "nglayout.initialpaint.delay" (without quotes), and set it's value to zero. This sets the time firefox "waits" to act on received information. Zero will speed things up but potentially use more resources, so if your computer is really old/weak maybe skip this one.