I think it sucks.
You spend thousands and thousands of resources researching it, then you spend a few thousand building the Phase Stabilizer(s), then you spend another few thousand activating the ability, which has a very, very long cooldown, and your reward is about 5 mismatched ships per Stabilizer every 15 minutes.
Don't use it, it'll lose you the game.
I disagree whole-heartedly. I am in a game right now where it is very beneficial for me. This is usually the case in larger maps. Once you have it researched to level 2, you get 7-10 ships per use. Usually I get 4-5 Ska Enforcers and 2-3 Lan Carriers.
Let's add those prices up. for each Ska Enf it costs 150 met/110 cry and for each Carrier it costs 160 met/140 cry. So, if I get 4 enf and 3 carriers, that is a total of 1080 metal and 860 crystal for each one bought seperately. By using RA, I have successfully re-inforced my fleet in juat a few seconds for a very small of the fraction of the price than building the ships individually and then having to wait a certain amount of time for each ship to build.
Other pluses are that you get an instant phase gate between any planets that have the Stabilizer in. Also, you can use RA for each Stabilizer. For instance, you have 4 Stabilizers...you can use each one in succession...1, 2, 3, 4, and have an instant small fleet of 28-40 ships and also with a great balance of ships in that small fleet.
At some point, you are gonna tech up to 8 labs any way, you just might do it a little quicker to get to RA, if that's how you choose to go. I think that it is way worth the effort in the long run on a larger map. And the money you save to use it for a re-inforcement of your fleet, instead of building 7 individual ships will soon pay off the difference of what it cost to get to have the ability to use RA.
Hope that made sense.