Oh, boy, jags...sleeping bags! One of my
favorite topics!
Looking at the price and specs, I believe I would pass, but that is speaking from my perspective, where I would need something a good bit warmer, and based on what they're asking in return for what they offer. No, I don't think it is worth buying.
Without going into great detail...
In general, a more versatile bag (and warmer, too) will have a hood included to keep one's noggin warm at night (a lot of heat gets lost through the head).
While there are good garments and sleeping bags insulated with duck down (I have a vest and jacket filled with the stuff, which are favorites), generally, a person will get more loft (fluffiness, thicker fill for the weight/space) with down. This can get a bit sketchy, 'cos there's a lot of overlap between "good" duck down and "bad" goose down, and it also depends on the size and quality of the plumules and how many feathers are in the mix (this one claims an 80down/20feather mix).
Despite the manufacturer claims of this being a "three-season" bag, I would consider it suitable for warmer weather/summer, and suggest bringing along a cap for your head on cooler nights.
If you're thinking of this for your May trip 'round Ireland and the weather is reasonable, I think you'd be fine temperature-wise. However, it looks like a poor value from my perspective on this side of the pond. Converting pounds to US dollars, it looks overpriced for the weight, construction and content (139.99 GBP = 223.492 USD). Down bags also need to be kept dry to stay fluffy/warm, so count on keeping it in a plastic sack inside its own stuff sack, or inside a larger dry bag or waterproof pannier if foul weather is a threat. Some really good synthetic-fill bags can be had for this price, and at comparable weight. A wet synthetic bag can be wrung out and will still retain some loft to keep you warm if it gets soaked.
Here's a couple tips when looking for a sleeping bag:
1) Look for the "EN" ratings included on bags for some means of comparing how warm they are. It at least means a sample of the bag has been lab-tested to get some idea how warm it might be for men and for women. The tests have some problems, and after getting submitted samples approved, I've found production examples vary widely. Still, the test numbers are better than nothing and a lot better than things used to be.
2) If you're 6-feet/182cm tall or under, a sleeping bag designed for women can work really well for a man. I deliberately chose this route myself, and couldn't be more pleased. Many women's bags include extra insulation where I also get cold -- head and feet -- and are a bit tighter, meaning I don't have as much "dead air" to heat up. If you want to read a review I wrote on my orange/silver women's-long model, see:
http://www.buzzillions.com/reviews/women-rei-halo-10-sleeping-bag-long-reviews Mine ended up both lighter and warmer than the equivalent men's bag, 'cos the insulation was in the right places and it was cut tighter. I also sorted through a lot to hand-pick a really good example.
Hope this helps!
All the best,
Dan.
