だけのことはある

1. 1The observed quality fully matches the person's or thing's status or reputation ('as expected of…').Ex. 1
2. 2The good result is fully worth the effort or cost put in ('…really paid off').Ex. 2

Used to express admiration or approval when something turns out as well as its reputation or the effort behind it suggests. It often appears sentence-finally and is frequently paired with さすが. The connective form だけのことはあって links the cause to the praiseworthy result, much like だけあって.

• だけあってN2「だけあって」 usually links two clauses, can also appear as 「だけあっての」 + noun, and is roughly interchangeable with 「だけのことはあって」. Its result can even be negative as long as it matches expectations, whereas 「だけのことはある」 is generally reserved for positive evaluations.
• だけにN2「だけに」 must be followed by a clause, works with both good and bad results, and can also express "the higher the expectations, the bigger the disappointment." It is interchangeable with 「だけのことはあって」 only when the first part is effort, status, or the like and the following clause is a good result befitting it.
• だけましだN2「だけましだ」 is used in a less-than-ideal situation to point out a saving grace, with a tone of resignation or consolation rather than praise, whereas this pattern positively acknowledges an excellent performance. The two are not interchangeable, and after a noun 「だけましだ」 needs 「な」 or 「である」.
• というものだN2「というものだ」 is the speaker's assertion about the nature of something or about a particular action, and its second sense often carries criticism. 「だけのことはある」 specifically means a performance matches one's status, effort, or the price, and is used only as positive evaluation, so the two are not interchangeable.
• ほどN3「ほど」 describes the extent a degree reaches (e.g., 「死ぬほど疲れた」) or, placed after a number or quantity, means "about," and carries no evaluation of its own. 「だけのことはある」 is a positive evaluation recognizing that a result befits one's status or effort, meaning "truly worthy of," so the two are not interchangeable.

だけあって has the same evaluative meaning but is mainly connective, while だけに stresses 'precisely because' and can lead to negative results. だけましだ means 'at least it's better', というものだ states what something is by nature, and ほど expresses degree, so none of these carry this pattern's 'lives up to expectations' sense.