The phrase "a worthwhile alternative" is correct and usable in written English.
You can use it when discussing options or choices that are valuable or beneficial compared to others.
Example: "After considering various options, we found that switching to renewable energy sources is a worthwhile alternative to fossil fuels."
Alternatives: "a valuable option" or "a beneficial choice".
Lan (0800 977 6100; lan.com) is a worthwhile alternative, with better service than Iberia.
Meanwhile, politicians of all sides are urging prospective students and their parents to see apprenticeships as a worthwhile alternative to now more costly university experience.
For this reason, the trial assembly of the structure in a virtual way, starting ideally from the data contained in the structure BIM, represents a worthwhile alternative to the physical one.
In the UK, where we are comparatively spoilt for quality media, AJE is widely regarded as one of the leading broadcasters, a worthwhile alternative to the BBC, Sky or Channel 4. Beyond also being a 24-hour news channel, al-Jazeera Arabic (AJA) is a very different beast in terms of language, content and frame of reference to al-Jazeera English.
DR/DSM programs represent a worthwhile alternative to the option of building new power facilities.
It is the downside protection that makes convertible preferreds a worthwhile alternative to buying the common stock assuming the stock pays little or no dividends.
Molten salt reactors (MSRs) are often advocated as a radical but worthwhile alternative to traditional reactor concepts based on solid fuels.
The CMWs still require some time before they are fully established and recognized as a viable and worthwhile alternative to the existing traditional birth attendants.
For many applications, local time stepping offers an interesting and worthwhile alternative to the by now well established global time step control.
It remains to be seen whether or not receptor-targeted therapy will prove to be a valuable treatment, but patients with non-iodine avid metastatic thyroid cancer currently face inexorable tumour progression with no worthwhile alternative therapy.
BNs have been recognized as worthwhile alternative to more traditional state-of-art models in terms of discrimination and classification power [ 9, 10], but their widespread application is nevertheless not evident.
