The DW and I took delivery of a 2011 Shamrock 21SS in January that we bought at the St Louis RV Show. Looking forward to many years of use out of our trailer, so far we have camped in it for 5 nights on 2 different trips and have about 20 more planned for this season.
be sure to post questions and info at the Expandable/Hybrid section, here at FRF.
there's a Shamrock sub-section for specific question for your model. you can also check the Roo sub-section, since it is the twin sister to the Shamrock.