SVT's music critic Per Sinding Larsen is in London, where the uproar surrounding Abbas' return has been great.

For example, the BBC moved its newscasts to be able to broadcast the first songs as soon as they were released.

In Sweden, some, such as DN's Hanna Fahl, have been skeptical of returns in general.

Others, such as freelancer Sara Martinson, have thought that Abba's musical heritage feels best left untouched.

Now that the reviews are starting to come, however, most agree so far:

- My colleagues in the critics are very positive about the two tracks, both in Sweden and internationally, says Per Sinding Larsen.

The tributes can be seen in Swedish media such as Expressen and Dagens nyheter and international media such as The Guardian and the BBC.

Per Sinding Larsen himself is also positive.

Hear his opinion on the two new songs in the video.