I've only used ALLcoin a few times, and they too were easy to use and quite responsive.
Maybe it's just me, but the page is very slow to open and refresh, no matter at what time of day or night the page is molasses slow
That seems to be the case on all exchanges. Not sure what they're doing, but it takes significant resources. I had my resource monitor open when I opened cryptsy a couple days ago, and it pegged all four cores for a minute. Well, a few seconds.