Handy compact package, great grab-and-go set for most applications, save for low-light usage, where the 25 mm objectives have limited light-gathering power. You can certainly use small binoculars for star gazing, or checking out birds at dusk, but larger objectives will give you a brighter image in those situations.
Was originally going to recommend the factory-refurbished product, but at the moment, due to discounts, it's actually slightly cheaper to buy non-refurbished! It happens sometimes as prices fluctuate.
Some of the Celestron products can be had for a good deal less, and they seem to have good ratings too, but I haven't had a chance to sample the current bunch.
I've had a pair of these Pentax for a decade or more. My basic car beater pair. Very good image quality, especially for the price. Looks as if there is now a waterproof set out there for more money. $55
The right Pentax or Nikon will be usable. The advantage of both these designs is that they are compact and they are harder to knock out of alignment. Olympus and Celestron are also quality. Other brands, best to avoid.
I've had these binoculars for 15 years and I still love them. 16x magnification, equivalent to the field of view of an 800mm lens in 35mm. Although they do cost $200, which is really inexpensive for the type. ($50 new will buy toy binoculars.)