It is funny you should bring the RC-150 up as I have that crossbow. I bought it two summers ago though it was a solid limb version. They appear to have made some changes to the design this year.

I will tell you that it is quite accurate, very quiet and pure fun to shoot. The only downside is the speed which typically hovers around 245 fps. Slow compared to most crossbows on the market but most crossbows aren't this quiet and this easy to cock back on your own.

Good model for some that is price conscious.