Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Background:  Experienced computer professional with over 20 years managing enterprise systems.
I bought this router/firewall to replace a failing UGate firewall. The BEFSR81 worked out of the box and I've got a mix of Linux and Windows systems connected to it.  SNMP also works like a charm - I use mrtg to get the stats.  I have had no issues at all with Shiva VPN tunneling to my office.
I started to have issues with the BEFSR81 locking up every day or two, and after exchanging a few e-mails with tech support, they agreed to cross-ship a replacement.  I plugged the new unit in, and it's been flawless ever since.  I couldn't ask for more.
A bunch of people in our office also have Linksys units and are all satisfied.  I recommend Linksys to anyone who asks.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive