I first caught "Phenomena" as an uncut (as in "intenrational version") Dutch tape in the early 90's, little later rented out the (surprisingly only slightly) cut German rental vhs before owning the mentioned Palace release as "Creepers" for a while.
A laserdisc and 2 DVD releases followed, with neither of them doing the film fully justice- so I'm very keen on upgrading to the "Arrow" release.
While I don't think the first use of "Iron Maiden" in the flick is really working too well, I loved about everything else about it, the mood, music, locations and in particular Pleasence's and Connelly's performances.