I carry my 239 .40 in a VMII and have no issues in any weather with any clothes. Wore cargo shorts and a T-shirt today and felt completely comfortable. It shoots well and is just a great gun overall. I don't think the SAS is really necessary, but if you can get that version at that price, I say go for it.
The only drawbacks I can think of have been mentioned. The .40 is 7+1, and there are lighter guns that carry more rounds. Don't mind the round count, but sometimes I do wish my 239 was a bit lighter.