I have the neon green Garneau one- found it on sale at Performance and picked it up. I recommend trying it on the helmet first though. Mine is too big and I have to put it on a special way lest I end my ride with a day-long forehead dent from the elastic.

#1: As far as recommending one, it really depends what your needs are. I got mine after the ride where I had to stop at least three times in an hour to find paper towels ( thanks Subway, Chevron and roadside barista lady) to squeeze rain out of my hair, which was pulled back, in an effort to stem the flood that was pouring into my eyes. Blindness was proving to be a huge liability and a bigger irritation. Dammit, if riding is not fun then any and all adjustments must be made on the spot to restore it to being super damn fun.

However, I found that unless it is an extremely rainy circumstance, the helmet cover acts as a terrarium, trapping all the heat from my body that is trying to escape through my head. Too hot. So, I think I have used it twice in four months.

During a week-long trip in Ventura county, I woke up to a rainy day and used the hotel shower cap. It worked beautifully.

#2: If I lost mine, I think I would find a replacement in my collection of hotel shower caps.

I live in Seattle, and ride through every weather that is ride-able -- if my bike will get through it and can stay upright in or on it, I ride. I value my super warm gloves and army-surplus wool socks far more than I do the helmet cover.