One card that is important to compare this card to is Hedge Fund. Say that you have 5 credits and a Hedge Fund, playing that card will allow you to rez an ice that costs 9 instead of the previous 5. If you instead have a Bioroid Efficiency Research instead, you can spend 2 less credits to rez and ice costing whatever you want. This means that the card is only better then Hedge Fund if you rez a piece of ICE costing at least 8, and that is not even counting the downside of the ice possibly getting de-rezed and the lack of flexibility.

This is a list of all bioroid ice costing more then 7: list

Looking at the list, it's currently only 6 cards, some of which are not great. The top contenders for using Bioroid Efficiency Research on now are Janus 1.0, Wotan and Fairchild. Each of these are quite annoying to break, and cost so much that Bioroid Efficiency Research is worth if over other operation economy.

With only 3 really good targets in the entire game, this card is very niche, but might have some place. There are some other support for running these super expensive bioroids, in the form of Sensor Net Activation and Accelerated Beta Test. Scoring either of those makes having several copies of super expensive bioroid ice in the deck a lot better. There is also Howler and Awakening Center, but they don't seem great. Eliza's Toybox is also in faction and have a similar effect.

Lastly Enforcer 1.0 is another card that is difficult to rez, and might give some extra value of Bioroid Efficiency Research, however it's quite difficult to justify rezzing otherwise, making it a dead card in quite a lot of situations.

So this card might make it into a deck some day, and might be worth revisiting when Janus 2.0, Heimdal 3.0, Ichi 3.0 and/or Enforcer 2.0 comes out, or any other super expensive ice comes out.

Because you rez on your own turn the runner knows what he or she is up against in advance. That makes this more of a tool to scare the runner away from running a server for a little while rather than for actually landing damage. I'd go with one of the other options for rezzing heavy bioroids for that reason. —
That's true, but the face check of both Fairchild and Wotan are very unexiting anyway. It's more of a deterent, but in a meta with ICE derezing and destruction it's not as bad as it have been —

While this card is very bad economically, there might be some use for it. If you can somehow get this behind two different pieces of ice, and then destroy the runner rig, it might take them a long time to recover. The main issue with that plan is that if you have two different pieces of ice, and the runner don't have a rig, just scoring agendas is usually a better plan. The only time I have had it work for me was in conjunction with Project Ares. My opponent where convinced it was a trap, so I got it up to like 10 counters, got a crackdown up to one and scored the Ares. Sadly Project Ares is also a bad card.

Against runners that don't care much for remote servers, this might be a way to punish them, but probably not much, as they can just ignore it in a lot of cases.