That may qualify as the one hit for this wonder...

I suspect that was their one and only hit in several countries.
That is the only one song I ever heard by them on the radio. The name itself was unknown in Mxico before the self titled album. That was the only song I had heard, and I loved it, I bought that album on vinyl, and more recently on CD (used, wouldn't have paid the full CD price, usually not very keen on doing that for stuff I have on vinyl).
The Songs To Learn and Sing (or viceversa) compilation hasn't made much of an effect on me. I haven't learned them I don't sing along to them.
I also purchased Ian McC's Candleland, some quite good songs there.

I also have Evergreen, and is OK, different than the EATB album, not bad. Got it as a gift, I may not have purchased it, or maybe I would. I think I like this one more than the self-titled one...

That's all my knowledge of this group... not among my favorites but I do spin those albums ocasionally. And maybe next time I do I'll amend some opinions expressed here, but maybe not.