I am not sure what his upside is but he is a big kid and has some similarities to his game as Mike Knuble. Knuble was a bit shorter and wider, but Florek can easily get up to 225 lbs and carry it no problem with that height. Florek is fundamentally solid, works the boards well and has no problem going to the net.
Knuble was a very good at picking up loose pucks down low, using his body, positioning, and hands to have several 20 goal seasons and hang around for over 1,000 games. Not bad for a guy who the Bruins picked up on waivers.
Knuble was drafted higher and had a much better college career so maybe I am off here and Florek is more along the lines of Byron Bitz as one of my friends and a semi-regular HF poster sees him as.
He'll likely be somewhere in the middle and has a chance to settle into a bottom 6 left wing spot in a year or two when Kelly and Paille vacate the spots, and if Fraser proves unable to consistently get time and space and/or be quick enough to get in position to use his outstanding shot.