This is a huge victory for Russian geopolitical interests as the end of hostilities will result in East-Ukraine gaining more autonomy. The only thing that remains is Europe backtracking on sanctions, then it would just be ridiculous.
While the rebels not getting stomped is obviously better for Russia than if they were, I'm not sure this really counts as a win for them. It's more like the best outcome they could scrape together considering the circumstances, but not the one they actually wanted.
Keep in mind that this time last year Russia still had high hopes that Ukraine would join their free trade organization as a key partner, one that would transform it from the current "Russia and its protectorates" to something a bit more credible. Russia felt that if that could be accomplished Ukraine could be turned into a reliable ally that would help secure its western border, similar to what Belarus has been for years.
All of that's gone. The only thing they got out of this is that they get to keep the Sevastopol naval base. Except now it's basically within shooting distance of a hostile nation. If having to keep Crimea is actually worth it probably depends on who you ask. It's obvious that the Russian people have an immense sentimental attachment to the peninsula but from a strategic perspective it's not that useful outside of Sevastopol itself, it will take untold billions to bring the place up to even Russian standards, let alone turn it into some kind of profit maker.
As for the "DPR" and "LNR", they bring very little to the table. Especially in the sorry state they are after the civil war. They provide a buffer and a distraction for Ukraine and just happen to have had some military industry that Russia could absorb to use for something. As long as they stand they will also most likely block Ukraine from being able to join NATO. And that's not even touching on the burnt relations with the EU, a suffering economy due to that fact and an EU that just got reminded that they and Russia don't see eye to eye and that many issues and that Russia is prepared to settle differences through force if need be.
All in all the "DPR", "LNR" and Crimea make up a rather pitiful consolation price compared to having all of Ukraine in the Russian camp. So from a purely economic and military perspective, Russia has won precious little in comparison to what they had planned to gain and might actually have emerged comparatively weaker if they can't restore their economy and the EU decides to re-arm. Still, the Russians might not care. This is a moral victory for them. As they see it, they've saved Russians in Ukraine from a genocide perpetrated by fascists, they stood strong in the face of imperialist westerners attempting to bully them into submission and they've retaken their rightful place as one of the great powers in the world.
If the average Russian will still feels this was a few years from now is anyone's guess. History is written by the victors, but few things stay won forever.