As you would expect from Pirastro and at this price these are top quality bass strings. They are made with synthetic core and metal winding and if you like the slightly softer feel of a synthetic cored string these are a great option. They have a full round sound and feel nice under the fingers as they are thicker than all metal strings.
They are well made, well finished and long lasting. I have a set on one bass that must now be five or more years old and they still play and sound great.
They come in normal or 'soft' tension. I have used both sets and they do have slight differences in feel and tone but I have been equally happy with both.
They are great as a general purpose string for covering a range of styles. Obviously, strings are very much a matter of personal taste/what suits a particular instrument/playing style etc. so there are no hard and fast rules... Definitely worth a try and, for what it's worth, my personal favourite!