Product review (1 stars): Had high hopes dashes
Great concept and appears to have acceptable design.  However, It didn't fit properly and I am chalking up the 30-40 buck for tape and pericscope as a total loss.  Maybe my house is old (1988) and it didn't fit because of that.  But I struggled to attach and within an hour had to switch back to the old accordian tube that I hoped to replace.  The periscope is a neat idea...but I just could not get it to fit even with the little screw tighten bands.

As an aside, the whole item could be designed better without all the gaps and also more sturdy.