To me the 2 Galcos, one shown by Chip here are the best tuckables around. There are 2 versions for the 239. The one shown by Chip and another that carries a leather loop; this leather loop is not tapered. These holsters also balances the gun very well which is surprising given the narrow loop. Sve your money too as you do not need the one with the enforced mouth for easy retention. The normal one holds up pretty well without the bulk.
I researched extensively this issue because I needed a holster that ensured that I had my gun on me at all times when I am out. I have spent a small fortune on holsters trying to find the right fit and I am planning to have a holster garage sale soon. So I pretty much know the pros and cons of most of them.
As I write this I currently have a G19 with 18 shots in one in my waist with shirt and tie and it is not visible, probably except to the well-trained eye. The Galco is so versatile for carry in most situations that I rarely use the Belly Band, ankle holster, shoulder holster and numerous other inside and outside the waist band holsters. Usually based on my dress and were I am going I would have to change holsters. It has been a great solution to the challenge of concealed carry.
I found it to be pricy (horsehide) but I am satisfied. The G19 Galco also holds the Beretta 92 compact very well also.
The only problem I find is that it causes my pants waist to collapse where it loops over under the belt. To minimise this, place the holster loop close to one of the pants loop where the belt provides more support to the waistband.
The Highnoon 'Ally' is pretty good also but it is not a Galco. Save the extra money and buy the Galco. Am I babbling yes, but it shows how pleased I am, now if I can only sell the other holsters.