One of their contributers is Shari Rabin, who is Jewish.
I agree with her position. I, personally, have tried to observe Shabbat recently, but it's almost impossible given my lifestyle and schedule. I usually have to work on Friday nights, which is a no-no. But since sundown these days is early (the official candle-lighting time for this weekend is 4:20 pm), I give myself a pass. When I come home from work, I light my candles. This is usually at almost 11:00 pm, but I think it counts. On Saturdays, I have to drive. Even in my car, it takes me 20 minutes to get across town to the nearest temple. Walking would be unnecessarily onerous. I try to avoid working on Saturday, but I'm doing well to get my boss to schedule me for the closing shifts which allow me the ability to attend Shabbat morning services and Conversion classes.
I think that the more important thing is to recognize that Shabbat is a gift, and let that be a day that can't stress you out. I do spend a lot more time in prayer on that day, and I make time for independent Torah study.
This weekend, I'll have Saturday off, and I plan to spend it with a friend, having a pleasant dinner and playing games. It will be great.