I've been there and loved it. It probably would depend on the type of plants you like. If you are focused on perennials - forget it, but if you love tropicals, begonias, citrus, unusual geraniums and wonderful vines like passifloras, don't miss it. Check out their web site http://www.logees.com and and see what you will see. The greenhouses are old but filled with glorious colorful plants. As you can probably tell, I'd go back in a skinny minute.
I think I was there 25 years ago, before the current owners. I'm not even sure if it was open to the public then. It's probably a much larger operation now. I can still remember the heavenly scent of earth mixed with exotic flora. Go...go!
It is run by the son and isn't really big - but has tons of plants. Most are hardy in zones 7 and up, a few zone 5-6, some cactus, some orchids. it's like a jungle - there are even vines growing on the bathroom ceiling. The asiles (?) are very narrow so if you're not a peanut I wouln't get dressed up. I think all their stuff is good quality and the owner, if you can catch him, is a nice and knowledgabel guy. But seriously, I've gone there in the winter - 20 degrees - and left my coat in the car. So bring water. It's not a place that you want to hurry thru.