If it doesn't synchronize some (not all) products or product information from icecat.biz, most likely you're using Open ICEcat and it has a limited database including some specific products, categories, or descriptions(including multiple languages).
For example, the product with model 94488228 doesn't have a description in Free Open ICEcat:
but it has in Full ICEcat:
In case you would like to have a complete database, you should order Full ICEcat and synchronize all data.
Please contact ICEcat official center for details.