Considering it's an antenna made for the 144-148 frequency band (and 440MHZ) I'd say you'd be hard pressed to find one better. I have one I have used on my dual band HT's for years..
One thing you may want to consider is that the repeaters are strong enough that the antenna won't make a difference. Also, the db figures given in the description are for transmitting, not receiving.
Is there such a thing as too many radios??
If you can't post something helpful, don't post.