I have fitted a set of helipods to a 44, they are not particularly user friendly as they don't just clip on/off. The load is useful but won't accept anything as large as a roll on case, more like a weekend bag. It does effect cruise speed but I don't remember the exact figures.
The build quality of the pods wasn't great, they were literally just a spray tank converted with a cut-out door, but it does give you a bit more flexibility for small bags or boxes. Check out
www.helipod.co.nz