I have 4 holsters used for two guns.
Sp101:
Bianchi Slide holster - nice OWB, cheap, good retention. Barrel hangs exposed, but doesn't bother me.
High Noon Hidden Ally - Tuckable IWB. Basic, functional, and allows me to tuck my shirt in to conceal. My only complaint is having 1 large clip, which I find to be rather noticable for such deep concealment offered by a tuckable holster.
Glock 36:
Don Hume JIT Slide - Nice OWB holster. Simple, minimal size, good retention, pretty cheap.
K&D Leather custom holster - The model I purchased is not made anymore, but the Thunder Bird is similar. Tuckable, this holster conceals very well, using 2 small clips on the front and back of my hip. I've replaced the standard clips with C-clips to make them nearly invisibile. Extremely comfortable, this holster makes carrying a breeze.
I am considering a new holster for my Sp101 to allow OWB with easier concealment. My current one allows the gun to hand too low to be conveniently covered with out a jacket.