RR - You 'should' get £75 from a push, although sadly not always guaranteed - would depend on how much has gone through since the previous biggy - as in all machines really! Watch for the mammoth blocks at £15 / the feature before the top, too, it loves getting you there for a good number of boards before relenting and giving the top. You 'have' to go for the top from this position, but then it is most frustrating if the streak does not kick in, as collecting the £15 would have probably yielded more profit.
Some other great Impulse machines:
Flashback (Cherry win / gamble / swap / reel blast / repeat)
Double Impact
Hurricane (a git for boards though!)

